tcolorbox (17sep20)

git-svn-id: svn://tug.org/texlive/trunk@56368 c570f23f-e606-0410-a88d-b1316a301751

42 files changed, 283 insertions, 208 deletions

diff --git a/Master/texmf-dist/doc/latex/tcolorbox/CHANGES b/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
index 6f79224bc84..d48ba782dc8 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
+++ b/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %%
 %% -------------------------------------------------------------------------------------------
 %% Copyright (c) 2006-2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
@@ -1153,3 +1153,14 @@ version 4.31 (2020/07/31)
 - documentation typo corrections (#102)
 - library 'documentation':
   * indention of <environment content> changed to \ttfamily (#100)
+
+version 4.32 (2020/09/17)
+- documentation typo corrections (#108) and enhancements (#109)
+- bug fix (#112): 'index format=doc' caused redefinition of '\_'
+    among other errors.
+- bug fix: 'valign=scale*' was erroneous.
+- enhancement (#110): color stack support for breakable boxes (pdflatex and lualatex)
+    to let colors survive a break to the next partial box.
+- library 'xparse':
+  * new options (#111): 'IfNoValueT', 'IfNoValueF', 'IfValueT', 'IfValueF',
+      'IfBooleanT', 'IfBooleanF'
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/README b/Master/texmf-dist/doc/latex/tcolorbox/README
index 9df1250c239..f421faa8ebe 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/README
+++ b/Master/texmf-dist/doc/latex/tcolorbox/README
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %%
 %% -------------------------------------------------------------------------------------------
 %% Copyright (c) 2006-2020 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.pdf
index 777c531725e..2f8c59debeb 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.tex
index 9b6514fdbaf..74eb419478e 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example-poster.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcolorbox-example-poster.tex: a poster example for tcolorbox
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
index 1798c61235f..b623da16766 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
index 8e682612b21..3a626698726 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcolorbox-example.tex: an example for tcolorbox
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.pdf
index b6c8a73e027..837d8ba475d 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.tex
index 3d12a3a6c10..a84d7045907 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-tutorial-poster.tex
@@ -1,5 +1,5 @@
 % \LaTeX-Main\
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcolorbox-tutorial-poster.tex: a tutorial for poster creation with tcolorbox
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.breakable.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.breakable.tex
index 4ebaee76d93..c714bfd4450 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.breakable.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.breakable.tex
@@ -7,6 +7,7 @@ The library is loaded by a package option or inside the preamble by:
 \begin{dispListing}
 \tcbuselibrary{breakable}
 \end{dispListing}
+This also loads the package |pdfcol|.
 
 \subsection{Technical Overview}
 The library \mylib{breakable} supports the automatic breaking of a |tcolorbox|.
@@ -108,9 +109,11 @@ parameters. The differences are:
   use \refKey{/tcb/enforce breakable} for the nested
   box\footnote{\refKey{/tcb/enforce breakable} acts like \refKey{/tcb/breakable} until |tcolorbox| 3.04.}.
   \textbf{But, a breakable box inside a breakable box will usually give a mess.}
-\item If your text content contains some text color changing commands,
-  your color will not survive the break to the next box.
-  But, with the |fontspec| package and |xelatex| or |lualatex|,
+\item\tcbdocmarginnote{\tcbdocnew{2020-09-17}}
+  Depending on the \LaTeX\ compiler, if your text content contains some text
+  color changing commands, your color may not survive the break to the next box.
+  Since |tcolorbox|~4.32, |pdflatex| and |lualatex| should not have that
+  problem. For |xelatex|, with the |fontspec| package,
   you can use
   |\addfontfeatures{Color=mycolor}|
   to add a font color which survives the break.
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
index 5f9d4acccbd..ba853c46e38 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
@@ -49,7 +49,7 @@ Now, we try again with adjusted titles:\\
 
 \begin{docTcbKey}{adjust text}{=\meta{text}}{no default, initially \texttt{\"Apgjy}}
   This sets the reference text for \refKey{/tcb/adjusted title}. If your texts
-  never exceed '\"Apgjy' in depth and height you don't need to care about this option.
+  never exceed \enquote{\"Apgjy} in depth and height you don't need to care about this option.
 \end{docTcbKey}
 
 \clearpage
@@ -1809,7 +1809,7 @@ used for boxes inside a \refEnv{tcbraster}.
 
 
 \clearpage
-\begin{docTcbKey}[][doc new={2017-06-28}]{inherit height}{\colOpt{=fraction}}{default |1|, initially unset}
+\begin{docTcbKey}[][doc new={2017-06-28}]{inherit height}{\colOpt{=\meta{fraction}}}{default |1|, initially unset}
   If this option is used for a |tcolorbox| which is embedded inside
   another (outer) |tcolorbox| \emph{and} if this outer |tcolorbox| has
   a fixed height, then the given \meta{fraction} of the available text height
@@ -2096,7 +2096,7 @@ with a listing.
 \begin{dispExample}
 \begin{tcolorbox}[use height from group=C,add to height=-2cm,
   colframe=blue!75!black,colback=white]
-Height from group 'C' of the previous example, but reduced by 2cm.
+Height from group \enquote{C} of the previous example, but reduced by 2cm.
 \end{tcolorbox}%
 \end{dispExample}
 
@@ -2866,7 +2866,7 @@ This behavior is controlled by the keys |before| and |after|.
 \end{docTcbKey}
 
 \enlargethispage*{1cm}
-\begin{docTcbKey}{forces nobeforeafter}{}{style, no value}
+\begin{docTcbKey}{force nobeforeafter}{}{style, no value}
   Forces the setting of \refKey{/tcb/nobeforeafter} even if
   \refKey{/tcb/before} and \refKey{/tcb/after} are set to other values
   later. Do not use this option globally unless you \emph{really} know what you do.
@@ -3411,7 +3411,7 @@ This is a \textbf{tcolorbox}.
 
 \begin{tcolorbox}[enhanced,spread upwards,sharp corners=north,height=3cm,
   colframe=blue!75!black,interior style={top color=blue!50,bottom color=white}]
-This is an example for 'spread upwards'.
+This is an example for \enquote{spread upwards}.
 \end{tcolorbox}
 \begin{docTcbKey}[][doc new=2017-02-13]{spread upwards}{\colOpt{=\meta{length}}}{default |0pt|, initially unset}
 Combination of
@@ -3420,7 +3420,7 @@ The optional \meta{length} is used for all these keys.
 \begin{dispListing}
 \begin{tcolorbox}[enhanced,spread upwards,sharp corners=north,height=3cm,
   colframe=blue!75!black,interior style={top color=blue!50,bottom color=white}]
-This is an example for 'spread upwards'.
+This is an example for \enquote{spread upwards}.
 \end{tcolorbox}
 \end{dispListing}
 \end{docTcbKey}
@@ -3461,13 +3461,13 @@ The optional \meta{length} is used for all these keys.
 \begin{dispListing}
 \begin{tcolorbox}[enhanced,spread downwards,sharp corners=south,
   colframe=red!75!black,interior style={top color=white,bottom color=red!50}]
-This is an example for 'spread downwards'.
+This is an example for \enquote{spread downwards}.
 \end{tcolorbox}
 \end{dispListing}
 \end{docTcbKey}
 \begin{tcolorbox}[enhanced,spread downwards,sharp corners=south,
   colframe=red!75!black,interior style={top color=white,bottom color=red!50}]
-This is an example for 'spread downwards'.
+This is an example for \enquote{spread downwards}.
 \end{tcolorbox}
 
 
@@ -3756,7 +3756,7 @@ This is a tcolorbox.
 This is a tcolorbox.
 \end{tcolorbox}
 
-\begin{tcolorbox}[capture=fitbox,height=9mm]% needs the 'fitting' library
+\begin{tcolorbox}[capture=fitbox,height=9mm]% needs the `fitting' library
 This is a tcolorbox.
 \end{tcolorbox}
 \end{exdispExample}
@@ -4058,7 +4058,7 @@ This is a tcolorbox.
 This box is automatically numbered with \ref{mynamelabel} on page
 \pageref{mynamelabel}.
 
-The box is titled '\nameref{mynamelabel}'.
+The box is titled \enquote{\nameref{mynamelabel}}.
 \end{dispExample}
 
 \begin{marker}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.documentation.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.documentation.tex
index 4ba5b569bf6..9c2cfe8f6d8 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.documentation.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.documentation.tex
@@ -897,7 +897,7 @@ which is commented by a note inside the margin.
 \end{docTcbKey}
 
 \begin{docTcbKey}[][doc new=2014-09-19]{doc new}{=\meta{date}}{style, no default}
-  Adds a a marginnote with a 'New: \meta{data}' message at the beginning of
+  Adds a a marginnote with a \enquote{New: \meta{date}} message at the beginning of
   the upper box part. The intended use is inside the option list of
   \refEnv{docCommand}, \refEnv{docEnvironment}, etc.
   \makeatletter\renewcommand*{\tcbdocnew}[1]{\kvtcb@text@new: #1}\makeatother%
@@ -910,13 +910,13 @@ Some command for something.
 
 
 \begin{docTcbKey}[][doc new=2014-09-19]{doc updated}{=\meta{date}}{style, no default}
-  Adds a marginnote with a 'Updated: \meta{data}' message at the beginning of
+  Adds a marginnote with a \enquote{Updated: \meta{date}} message at the beginning of
   the upper box part. See \refKey{/tcb/doc new}.
 \end{docTcbKey}
 
 
 \begin{docTcbKey}[][doc new=2014-09-19]{doc new and updated}{=\marg{new date}\marg{update date}}{style, no default}
-  Adds a marginnote with 'New: \meta{new date}' and 'Updated: \meta{update data}' messages at the beginning of
+  Adds a marginnote with \enquote{New: \meta{new date}} and \enquote{Updated: \meta{update date}} messages at the beginning of
   the upper box part. See \refKey{/tcb/doc new}.
 \end{docTcbKey}
 
@@ -1228,7 +1228,7 @@ keys to insert code before (or after) the description texts.
   Sets the options from the package |listings| \cite{hoffmann:listings}.
   They are used inside \refEnv{dispExample} and \refEnv{dispListing} to typeset
   the listings. Note that this is not identical to the key
-  \refKey{/tcb/listing options} which is used for 'normal' listings.\\
+  \refKey{/tcb/listing options} which is used for \enquote{normal} listings.\\
   Used for \refKey{/tcb/listing engine}|=listings| only.
 \end{docTcbKey}
 
@@ -1237,7 +1237,7 @@ keys to insert code before (or after) the description texts.
   This key sets a \meta{style}
   for the |listings| package, see \cite{hoffmann:listings}.
   Note that this is not identical to the key
-  \refKey{/tcb/listing style} which is used for 'normal' listings.\\
+  \refKey{/tcb/listing style} which is used for \enquote{normal} listings.\\
   Used for \refKey{/tcb/listing engine}|=listings| only.
 \end{docTcbKey}
 
@@ -1245,7 +1245,7 @@ keys to insert code before (or after) the description texts.
   Sets the options from the package |minted| \cite{poore:minted}
   which are used during typesetting of the listing, if used.
   Note that this is not identical to the key
-  \refKey{/tcb/minted options} which is used for 'normal' listings.\\
+  \refKey{/tcb/minted options} which is used for \enquote{normal} listings.\\
   Used for \refKey{/tcb/listing engine}|=minted| only.
 \end{docTcbKey}
 
@@ -1253,7 +1253,7 @@ keys to insert code before (or after) the description texts.
   Sets a \meta{style} known to |Pygments| \cite{pygments:web} for
   the package |minted| \cite{poore:minted}, if used.
   Note that this is not identical to the key
-  \refKey{/tcb/minted style} which is used for 'normal' listings.\\
+  \refKey{/tcb/minted style} which is used for \enquote{normal} listings.\\
   Used for \refKey{/tcb/listing engine}|=minted| only.
 \end{docTcbKey}
 
@@ -1261,7 +1261,7 @@ keys to insert code before (or after) the description texts.
   Sets a \meta{programming language} known to |Pygments| \cite{pygments:web}
   for the package |minted| \cite{poore:minted}, if used.
   Note that this is not identical to the key
-  \refKey{/tcb/minted language} which is used for 'normal' listings.\\
+  \refKey{/tcb/minted language} which is used for \enquote{normal} listings.\\
   Used for \refKey{/tcb/listing engine}|=minted| only.
 \end{docTcbKey}
 
@@ -1345,15 +1345,15 @@ instead. Also see \refKey{/tcb/docexample}.
 
 
 \begin{docTcbKey}{index actual}{=\meta{character}}{no default, initially |@|}
-  Sets the character for 'actual' in automatic indexing.
+  Sets the character for \enquote{actual} in automatic indexing.
 \end{docTcbKey}
 
 \begin{docTcbKey}{index quote}{=\meta{character}}{no default, initially |"|}
-  Sets the character for 'quote' in automatic indexing.
+  Sets the character for \enquote{quote} in automatic indexing.
 \end{docTcbKey}
 
 \begin{docTcbKey}{index level}{=\meta{character}}{no default, initially |!|}
-  Sets the character for 'level' in automatic indexing.
+  Sets the character for \enquote{level} in automatic indexing.
 \end{docTcbKey}
 
 \begin{docTcbKey}{index default settings}{}{style, no value}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.fitting.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.fitting.tex
index 20feddda9a6..607ef007697 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.fitting.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.fitting.tex
@@ -148,7 +148,7 @@ elaborate methods to create new commands.
 The font size for the content of a box with fixed width and fixed height
 can be adjusted automatically. This is called the \emph{fitbox capture mode}.
 Note that the fit control algorithm
-constructs a series of versions for the box and selects the 'best'.
+constructs a series of versions for the box and selects the \enquote{best}.
 Therefore, the compilation time is quite longer than for a normal box.
 The algorithm will fail, if a different selected font size does not change the
 overall size of the box content.
@@ -565,7 +565,7 @@ if necessary.
   the auxiliary boxes may produce many |hbox| warnings. This option key
   changes the |\hbadness| value.
   \begin{itemize}
-  \item\docValue{off}: Most of |'Underfull \hbox'| and |'Overfull \hbox'| warnings are
+  \item\docValue{off}: Most of |`Underfull \hbox'| and |`Overfull \hbox'| warnings are
     switched off (including the ones for the finally used box).
   \item\docValue{on}: All warnings for all auxiliary boxes are displayed.
   \item\docValue{final}: Only warnings for the finally used box are displayed.
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.hooks.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.hooks.tex
index 9d00380f428..f3fab2221bd 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.hooks.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.hooks.tex
@@ -23,9 +23,9 @@ places code before the content of the upper part. A following usage of this
 key overwrites any prior settings.
 
 The library \mylib{hooks} extends \refKey{/tcb/before upper} and several more
-existing keys to 'hookable' versions, e.\,g.\ 
+existing keys to \enquote{hookable} versions, e.\,g.\ 
 \refKey{/tcb/before upper app} and \refKey{/tcb/before upper pre}.
-The 'hookable' keys don't overwrite prior settings but either \emph{app}end
+The \enquote{hookable} keys don't overwrite prior settings but either \emph{app}end
 or \emph{pre}pend the newly given code to the existing code.
 
 The general naming convention (with some small exceptions) is:
@@ -46,7 +46,7 @@ Therefore, the order of the option key usage is crucial.
 \tcbset{enhanced,fonttitle=\bfseries\large,fontupper=\normalsize\sffamily,
   colback=yellow!10!white,colframe=red!50!black,colbacktitle=Salmon!30!white,
   coltitle=black,center title,
-  tabularx={X||Y|Y|Y|Y||Y},% this sets 'before upper' and 'after upper'
+  tabularx={X||Y|Y|Y|Y||Y},% this sets `before upper' and `after upper'
   before upper app={Group & One & Two & Three & Four & Sum\\\hline\hline}  }
 
 \begin{tcolorbox}[title=My table]
@@ -102,7 +102,7 @@ from page \pageref{subsec:contentadditions}.
 % \tcbuselibrary{theorems}
 
 \begin{tcolorbox}[
-  ams align,%  this sets 'before upper*' and 'after upper*'
+  ams align,%  this sets `before upper*' and `after upper*'
   colback=yellow!10!white,colframe=red!50!black,
   before upper app={\frac{2}{\sqrt{2}}&=\sqrt{2}.\\},
   after upper pre={\\\sin\left(\frac{\pi}{2}\right)&=1.},
@@ -138,7 +138,7 @@ The following option keys extend the options given in Subsection \ref{subsec:sur
 from page \pageref{subsec:surroundings}.
 
 \begin{marker}
-The 'hookable' versions are usable inside the document.
+The \enquote{hookable} versions are usable inside the document.
 In the preamble, they can only be used after explicit setting of
 \refKey{/tcb/before} and \refKey{/tcb/after} or by e.\,g.\ \refKey{/tcb/parskip}.
 \end{marker}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.intro.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.intro.tex
index 4c8fb7683ad..e744a6f96f3 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.intro.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.intro.tex
@@ -18,7 +18,7 @@ With this package, you are invited to apply these boxes for similar projects.
 The breaking news for version 2.00 was the support for breakable boxes.
 This feature allows new applications of the package without
 affecting the core package too much if you do not need boxes to break automatically.
-With version 2.20, the often requested 'side by side' mode for listings has been added.
+With version 2.20, the often requested \enquote{side by side} mode for listings has been added.
 With version 3.00, boxed titles are introduced together with improved
 customization options for overlays, underlays, finishes, and own code extensions.
 
@@ -145,7 +145,7 @@ The following keys are used inside |\tcbuselibrary| respectively
 \end{docTcbKey}
 
 \begin{docTcbKey}[library]{hooks}{}{\mylib{hooks}}
-  Extends several option keys to 'hookable' keys;
+  Extends several option keys to \enquote{hookable} keys;
   see Section~\ref{sec:hooks} from page~\pageref{sec:hooks}.
 \end{docTcbKey}
 
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
index 9a0a8ad1a62..8f99797bc24 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
@@ -51,7 +51,7 @@ the package |listingsutf8| \cite{oberdiek:listingsutf8} by loading the library
 variant \mylib{listingsutf8}.
 \begin{dispListing}
 \tcbuselibrary{listingsutf8}
-\tcbset{listing utf8=latin1}% optional; 'latin1' is the default.
+\tcbset{listing utf8=latin1}% optional; `latin1' is the default.
 \end{dispListing}
 This also loads the library \mylib{listings}
 and the packages |listings| \cite{hoffmann:listings}
@@ -464,7 +464,7 @@ Sets a \meta{programming language} known to |Pygments| \cite{pygments:web}.
   minted language=java,
   colback=red!5!white,colframe=red!75!black,listing only}
     public class HelloWorld {
-      // A 'Hello World' in Java
+      // A `Hello World' in Java
       public static void main(String[] args) {
         System.out.println("Hello World!");
       }
@@ -491,7 +491,7 @@ Sets a \meta{programming language} known to |Pygments| \cite{pygments:web}.
 
 \begin{myjava}
   public class HelloWorld {
-    // A 'Hello World' in Java
+    // A `Hello World' in Java
     public static void main(String[] args) {
       System.out.println("Hello World!");
     }
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.magazine.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.magazine.tex
index bf9c106bc44..2fb03f38938 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.magazine.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.magazine.tex
@@ -100,8 +100,8 @@ registers.
   be appended to the already existing boxes.
   This command does not clear box registers.
 \begin{dispListing}
-\boxarrayreset            % resets 'default'
-\boxarrayreset{myarray}   % resets 'myarray'
+\boxarrayreset            % resets `default'
+\boxarrayreset{myarray}   % resets `myarray'
 \end{dispListing}
 \end{docCommand}
 
@@ -113,8 +113,8 @@ registers.
   you apply \refKey{/tcb/store to box array}.
 \begin{dispListing}
 \tcbset{
-  reset box array,         % resets 'default'
-  reset box array=myarray, % resets 'myarray'
+  reset box array,         % resets `default'
+  reset box array=myarray, % resets `myarray'
 }
 \end{dispListing}
 \end{docTcbKey}
@@ -129,8 +129,8 @@ registers.
   If \refCom{consumeboxarray} or \refCom{consumetcboxarray} was used to
   apply the stored boxes, there is no advantage in using \refCom{boxarrayclear}.
 \begin{dispListing}
-\boxarrayclear            % clears 'default'
-\boxarrayclear{myarray}   % clears 'myarray'
+\boxarrayclear            % clears `default'
+\boxarrayclear{myarray}   % clears `myarray'
 \end{dispListing}
 \end{docCommand}
 
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_main.sty b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_main.sty
index 80604e3d049..32e77fc9f0b 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_main.sty
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_main.sty
@@ -288,7 +288,7 @@
 \robustify{\mylib}
 
 \pdfstringdefDisableCommands{%
-  \def\mylib#1{'#1'}%
+  \def\mylib#1{`#1'}%
 }
 
 \newrobustcmd*{\tcbexclamation}{!}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_snippet.sty b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_snippet.sty
index 785b65b23cb..9bd1a069ef0 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_snippet.sty
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.s_snippet.sty
@@ -114,14 +114,14 @@
 \begin{tcbverbatimwrite}{\jobname_preamble_K.tex}
 \usepackage{amsthm}
 
-\theoremstyle{plain}%    from 'amsthm'
-\newtheorem{lem}{Lemma}% from 'amsthm'
+\theoremstyle{plain}%    from `amsthm'
+\newtheorem{lem}{Lemma}% from `amsthm'
 
 \tcolorboxenvironment{lem}{
   enhanced jigsaw,colframe=cyan,interior hidden,
   breakable,before skip=10pt,after skip=10pt }
 
-\tcolorboxenvironment{proof}{% 'proof' from 'amsthm'
+\tcolorboxenvironment{proof}{% `proof' from `amsthm'
   blanker,breakable,left=5mm,
   before skip=10pt,after skip=10pt,
   borderline west={1mm}{0pt}{red}}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
index adfbd7f091c..646d4229aea 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
@@ -2973,9 +2973,9 @@ This box looks like a box provided by the \texttt{beamer} class.
 \tcbset{skintable/.style={colframe=red!50!yellow!50!black,
   colback=red!50!yellow!5!white,coltitle=red!50!yellow!3!white,
   fonttitle=\bfseries,before=\par\smallskip,
-  title=Environment and engines for the skin '\texttt{#1}'}}
+  title=Environment and engines for the skin \enquote{\texttt{#1}}}}
 
-\subsection{Skin Family 'standard'}\label{subsec:skinstandard}
+\subsection{Skin Family \enquote{standard}}\label{subsec:skinstandard}
 \begin{marker}Note that the option keys \refKey{/tcb/frame style},
   \refKey{/tcb/interior style},
   \refKey{/tcb/segmentation style}, and
@@ -3077,10 +3077,10 @@ This box looks like a box provided by the \texttt{beamer} class.
 
 
 \clearpage
-\subsection{Skin Family 'enhanced'}
+\subsection{Skin Family \enquote{enhanced}}
 \begin{marker}
 If you like the standard appearance of a |tcolorbox| but you want to
-have some 'enhanced' features, the |enhanced| skin is what you are looking for.
+have some \enquote{enhanced} features, the |enhanced| skin is what you are looking for.
 \end{marker}
 
 \begin{docSkin}{enhanced}
@@ -3143,7 +3143,7 @@ have some 'enhanced' features, the |enhanced| skin is what you are looking for.
   segmentation style={black,solid,opacity=0.2,line width=1pt}}
 
 \begin{tcolorbox}[title=Nice box in rainbow colors]
-  With the 'enhanced' skin, it is quite easy to produce fancy looking effects.
+  With the \enquote{enhanced} skin, it is quite easy to produce fancy looking effects.
   \tcblower
   Note that this is still a \texttt{tcolorbox}.
 \end{tcolorbox}
@@ -3588,7 +3588,7 @@ Nevertheless, this skin can be applied independently.
 
 
 \clearpage
-\subsection{Skin Family 'bicolor'}
+\subsection{Skin Family \enquote{bicolor}}
 \begin{docSkin}{bicolor}
   This skin is quite similar to the \refSkin{standard} and \refSkin{enhanced} skin.
   But instead of a segmentation line, the optional lower part of the box is filled with a
@@ -3682,13 +3682,13 @@ Nevertheless, this skin can be applied independently.
   basicstyle=\ttfamily\bfseries,extendedchars=true}}}
 
 \begin{tcblisting}{title={Snapshot of the staging area},
-  gitexample={The option '-a' automatically stages all tracked and modified
+  gitexample={The option `-a' automatically stages all tracked and modified
               files before the commit.\par
-              This can be combined with the message option '-m'
+              This can be combined with the message option `-m'
               as seen in the third line.}}
 git commit
 git commit -a
-git commit -am 'changes to my example'
+git commit -am `changes to my example'
 \end{tcblisting}
 \end{dispExample}
 
@@ -3828,7 +3828,7 @@ Nevertheless, this skin can be applied independently.
 
 
 \clearpage
-\subsection{Skin Family 'tile'}
+\subsection{Skin Family \enquote{tile}}
 \begin{docSkin}[doc new=2016-02-25]{tile}
   This skin is a variant of skin \refSkin{bicolor}. Especially, the
   optional lower part of the box is colored by \refKey{/tcb/colbacklower}.
@@ -4011,11 +4011,11 @@ Nevertheless, this skin can be applied independently.
 
 
 \clearpage
-\subsection{Skin Family 'beamer'}
+\subsection{Skin Family \enquote{beamer}}
 
 \begin{docSkin}{beamer}
   This skin resembles boxes known from the |beamer| class and therefore is
-  called 'beamer'. It uses the normal colors from the core package but shades
+  called \enquote{beamer}. It uses the normal colors from the core package but shades
   them a little bit. To use this skin, the |tikz| library |shadings|
   has to be included in the preamble by:
 \begin{dispListing}
@@ -4070,7 +4070,7 @@ Nevertheless, this skin can be applied independently.
 
 \begin{dispExample}
 \begin{tcolorbox}[beamer,colback=Salmon!50!white,colframe=FireBrick!75!black,
-  adjusted title=A colored box with the 'beamer' skin]
+  adjusted title=A colored box with the \enquote{beamer} skin]
 This box looks like a box provided by the \texttt{beamer} class.
 \end{tcolorbox}
 \end{dispExample}
@@ -4227,7 +4227,7 @@ Nevertheless, this skin can be applied independently.
 
 
 \clearpage
-\subsection{Skin Family 'widget'}
+\subsection{Skin Family \enquote{widget}}
 \begin{docSkin}{widget}
   This skin uses the normal colors from the core package but shades
   them a little bit. To use this skin, the |tikz| library |shadings|
@@ -4284,7 +4284,7 @@ if needed.
 
 \begin{dispExample}
 \begin{tcolorbox}[widget,colback=Salmon!50!white,colframe=FireBrick!75!black,
-  adjusted title=A colored box with the 'widget' skin]
+  adjusted title=A colored box with the \enquote{widget} skin]
 This is my content.
 \end{tcolorbox}
 \end{dispExample}
@@ -4421,7 +4421,7 @@ Nevertheless, this skin can be applied independently.
 
 
 \clearpage
-\subsection{Skin Family 'empty'}
+\subsection{Skin Family \enquote{empty}}
 
 \begin{docSkin}{empty}
   This skin sets all engines to |empty|, i.\,e.\ nothing is drawn at all.
@@ -4738,7 +4738,7 @@ are drawn by the codes given by
 
 \clearpage
 
-\subsection{Skin 'spartan'}\label{subsec:spartan}
+\subsection{Skin \enquote{spartan}}\label{subsec:spartan}
 
 \begin{docSkin}{spartan}
   This skin is quite \ldots\ spartan.
@@ -4794,7 +4794,7 @@ are drawn by the codes given by
 
 \clearpage
 
-\subsection{Skin 'draft'}\label{subsec:draft}
+\subsection{Skin \enquote{draft}}\label{subsec:draft}
 
 \begin{docSkin}{draft}
   This skin is intended to be used while drafting new geometric settings
@@ -4843,7 +4843,7 @@ are drawn by the codes given by
 
 \begin{dispExample}
 \vspace*{3mm}
-\begin{tcolorbox}[draft,title=A colored box with the 'draft' skin]
+\begin{tcolorbox}[draft,title=A colored box with the \enquote{draft} skin]
 \lipsum[1-3]
 \tcblower
 \lipsum[4-6]
@@ -4853,9 +4853,9 @@ are drawn by the codes given by
 
 
 \clearpage
-\subsection{Skin Family 'freelance'}
+\subsection{Skin Family \enquote{freelance}}
 \begin{marker}
-This skin family 'freelance' is deprecated with |tcolorbox| 3.00.
+This skin family \enquote{freelance} is deprecated with |tcolorbox| 3.00.
 It is not longer needed, because
 \refKey{/tcb/frame code},
 \refKey{/tcb/interior code},
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
index e67508f74ca..672ff20421d 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
@@ -27,14 +27,14 @@ This also loads the package |amsmath|.
   is also set as \refKey{/tcb/nameref} identifier.
   The second mandatory parameter is a \meta{marker}. The theorem is
   automatically labeled with \meta{prefix}\meta{separator}\meta{marker}
-  where \meta{separator} is predefined as '|:|', see \refKey{/tcb/label separator}.\par
+  where \meta{separator} is predefined as \enquote{|:|}, see \refKey{/tcb/label separator}.\par
   The new environment \meta{name}|*| takes one optional and one mandatory
   parameter and represents an unnumbered variant of the environment \meta{name}.
   This variant is not labeled and not listed in lists of theorems.
 \enlargethispage*{20mm}
 \inputpreamblelisting{F}
 \begin{dispExample}
-% usage of '\nameref' needs 'nameref' or 'hyperref' to be loaded
+% usage of `\nameref' needs `nameref' or `hyperref' to be loaded
 \begin{mytheo}{This is my title}{theoexample}
   This is the text of the theorem. The counter is automatically assigned and,
   in this example, prefixed with the section number. This theorem is numbered with
@@ -52,7 +52,7 @@ This also loads the package |amsmath|.
 
 \begin{dispExample}
 \begin{mytheo}{}{}
-  The title can also be left empty without problem. Note that the ':'
+  The title can also be left empty without problem. Note that the \enquote{:}
   vanished magically.
 \end{mytheo}
 \end{dispExample}
@@ -100,7 +100,7 @@ To switch off the \texttt{nameref} feature permanently, add
   The first mandatory parameter is the title text for the theorem and
   the second mandatory parameter is a \meta{marker}. The theorem is
   automatically labeled with \meta{prefix}\meta{separator}\meta{marker}
-  where \meta{separator} is predefined as '|:|', see \refKey{/tcb/label separator}.
+  where \meta{separator} is predefined as \enquote{|:|}, see \refKey{/tcb/label separator}.
 \end{deprecated}
 \end{docCommand}
 
@@ -424,7 +424,7 @@ the first setting.
   and \refKey{/tcb/theorem label supplement} can be used independently.
 
 \begin{dispExample}
-% 'marginnote' has to be loaded
+% `marginnote' has to be loaded
 \newtcbtheorem[use counter from=mytheo]{sometheorem}{Theorem}%
    {colback=white,colframe=red!50!black,fonttitle=\bfseries,
     theorem label supplement={hypertarget={XYZ-##1}},
@@ -498,19 +498,31 @@ created by hand or using \refCom{tcbmaketheorem} or using its successor
 \refCom{newtcbtheorem}.
 \end{docTcbKey}
 
+\clearpage
 
 \begin{docTcbKey}{highlight math}{}{style, no value}
-  Predefined style which is used for \refCom{tcbhighmath}.
-  It can be changed comfortable with \refKey{/tcb/highlight math style}.
+  A style which is used for \refCom{tcbhighmath} and which is
+  predefined as |notitle,nophantom,colframe=red,colback=yellow!25!white|.\par
+  It can be changed with the usual |pgf| techniques or
+  with \refKey{/tcb/highlight math style}.
+\begin{dispExample}
+\begin{align*}
+  \tcbhighmath{1} + 1 &= 2,\\
+  \tcbset{highlight math/.append style={left=0mm,right=0mm,top=0mm,bottom=0mm}}
+  \tcbhighmath{1} + 1 &= 2.
+\end{align*}
+\end{dispExample}
+
 \end{docTcbKey}
 
 
 \begin{docTcbKey}{highlight math style}{=\meta{style definition}}{style, no default}
-  Changes the definition for \refKey{/tcb/highlight math} to the given
-  \meta{style definition}. See \refCom{tcbhighmath} for another example.
+  Changes the definition for \refKey{/tcb/highlight math} to
+  |notitle,nophantom| plus the given \meta{style definition}.
+  See \refCom{tcbhighmath} for another example.
 \begin{dispExample}
 % \tcbuselibrary{skins}
-\tcbset{highlight math style={enhanced,%<-- needed for the 'remember' options
+\tcbset{highlight math style={enhanced,%<-- needed for the `remember' options
   colframe=red,colback=red!10!white,boxsep=0pt}}
 \begin{align*}
 \tcbhighmath[remember as=fx]{f(x)}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.xparse.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.xparse.tex
index f5ad60430ab..bad6fd6a60e 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.xparse.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.xparse.tex
@@ -33,8 +33,24 @@ for details about the argument \meta{specification} used in this section.
 \end{docTcbKey}
 
 
-\begin{docTcbKey}{IfNoValueTF}{=\marg{argument}\marg{true options}\marg{false options}}{no default}
-  Wraps the |\IfNoValueTF| command of |xparse| for option setting.
+\begin{docTcbKeys}[doc description = {no default}]
+  {
+    {
+      doc name        = IfNoValueTF,
+      doc parameter   = {=\marg{argument}\marg{true options}\marg{false options}},
+    },
+    {
+      doc name        = IfNoValueT,
+      doc parameter   = {=\marg{argument}\marg{true options}},
+      doc new         = 2020-09-16,
+    },
+    {
+      doc name        = IfNoValueF,
+      doc parameter   = {=\marg{argument}\marg{false options}},
+      doc new         = 2020-09-16,
+    }
+  }
+  Wraps the |\IfNoValue(TF)| command(s) of |xparse| for option setting.
   If the \meta{argument} has no value, the \meta{true options} are set.
   Otherwise, the \meta{false options} are set.
 \begin{dispExample}
@@ -49,16 +65,34 @@ This is a tcolorbox.
 This is a tcolorbox.
 \end{mybox}
 \end{dispExample}
-\end{docTcbKey}
+\end{docTcbKeys}
 
 \clearpage
-\begin{docTcbKey}{IfValueTF}{=\marg{argument}\marg{true options}\marg{false options}}{no default}
-  Wraps the |\IfValueTF| command of |xparse| for option setting.
+
+
+\begin{docTcbKeys}[doc description = {no default}]
+  {
+    {
+      doc name        = IfValueTF,
+      doc parameter   = {=\marg{argument}\marg{true options}\marg{false options}},
+    },
+    {
+      doc name        = IfValueT,
+      doc parameter   = {=\marg{argument}\marg{true options}},
+      doc new         = 2020-09-16,
+    },
+    {
+      doc name        = IfValueF,
+      doc parameter   = {=\marg{argument}\marg{false options}},
+      doc new         = 2020-09-16,
+    }
+  }
+  Wraps the |\IfValue(TF)| command(s) of |xparse| for option setting.
   If the \meta{argument} has a value, the \meta{true options} are set.
   Otherwise, the \meta{false options} are set.
 \begin{dispExample}
 \DeclareTColorBox{mybox}{ o }{colframe=red!75!black,colback=red!5!white,
-  IfValueTF={#1}{title={\flqq #1\frqq},fonttitle=\bfseries}{}}
+  IfValueT={#1}{title={\flqq #1\frqq},fonttitle=\bfseries}}
 
 \begin{mybox}
 This is a tcolorbox.
@@ -68,10 +102,28 @@ This is a tcolorbox.
 This is a tcolorbox.
 \end{mybox}
 \end{dispExample}
-\end{docTcbKey}
-
-\begin{docTcbKey}{IfBooleanTF}{=\marg{argument}\marg{true options}\marg{false options}}{no default}
-  Wraps the |\IfBooleanTF| command of |xparse| for option setting.
+\end{docTcbKeys}
+
+\medskip
+
+\begin{docTcbKeys}[doc description = {no default}]
+  {
+    {
+      doc name        = IfBooleanTF,
+      doc parameter   = {=\marg{argument}\marg{true options}\marg{false options}},
+    },
+    {
+      doc name        = IfBooleanT,
+      doc parameter   = {=\marg{argument}\marg{true options}},
+      doc new         = 2020-09-16,
+    },
+    {
+      doc name        = IfBooleanF,
+      doc parameter   = {=\marg{argument}\marg{false options}},
+      doc new         = 2020-09-16,
+    }
+  }
+  Wraps the |\IfBoolean(TF)| command(s) of |xparse| for option setting.
   If the \meta{argument} is |\BooleanTue|, the \meta{true options} are set.
   If the \meta{argument} is |\BooleanFalse|, the \meta{false options} are set.
 
@@ -87,7 +139,7 @@ This is a tcolorbox.
 This is a tcolorbox.
 \end{mybox}
 \end{dispExample}
-\end{docTcbKey}
+\end{docTcbKeys}
 
 
 
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
index e9a5c9374d2..ef1068931f8 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
index f159b971428..2b2a2d9102a 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
@@ -1,5 +1,5 @@
 % \LaTeX-Main\
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcolorbox.tex: Manual
 %%
 %% -------------------------------------------------------------------------------------------
@@ -43,8 +43,8 @@
 \setlength{\bibitemsep}{\smallskipamount}
 \addbibresource{tcolorbox.doc.bib}
 
-\def\version{4.31}%
-\def\datum{2020/07/31}%
+\def\version{4.32}%
+\def\datum{2020/09/17}%
 \makeindex
 
 \hypersetup{
@@ -62,7 +62,7 @@
 %\geometry{showframe}
 %\tcbset{draftmode}
 \tcbset{/tcb/external/-}% for final run
-%\includeonly{tcolorbox.doc.external}
+%\includeonly{tcolorbox.doc.breakable}
 
 %\hypersetup{colorlinks=false}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
index 4f3eb68f926..2405db4b60b 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbbreakable.code.tex: Code for breakable colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,10 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
+
+\RequirePackage{pdfcol}
+\pdfcolInitStack{tcb@breakable}
 
 \let\tcb@parboxrestore@true=\tcb@parboxrestore
 \let\tcb@parboxrestore@false\tcb@parbox@false@settings
@@ -73,6 +76,7 @@
   \reserved@a%
   \@endpefalse%
   \let\tcbbreak\tcb@@break%
+  \pdfcolSwitchStack{tcb@breakable}%
   \color@begingroup%
   \textwidth\hsize%
   \columnwidth\hsize%
@@ -317,7 +321,6 @@
     \tcb@parfillskip@check%
     \tcb@split@start%
   \endgroup%
-  \color{.}% hack for some special cases
   \ifx\kvtcb@float\@empty\relax%
     \aftergroup\tcb@use@after@lastbox%
   \fi%
@@ -900,26 +903,32 @@
 }
 
 
+\def\tcb@init@breakability{%
+  \let\tcb@savebox=\tcb@vbox%
+  \let\endtcb@savebox=\endtcb@vbox%
+  \let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable%
+  \pdfcolIfStackExists{tcb@breakable}{%
+    \appto\tcb@upperdraw@begin@hook{\pdfcolSetCurrent{tcb@breakable}}%
+    \appto\tcb@lowerdraw@begin@hook{\pdfcolSetCurrent{tcb@breakable}}%
+  }{%
+    \appto\tcb@upperdraw@begin@hook{\color{tcbcolupper}}%
+    \appto\tcb@lowerdraw@begin@hook{\color{tcbcollower}}%
+  }%
+}
 
 \tcbset{%
   breakable@true/.code={%
-    \let\tcb@savebox=\tcb@vbox%
-    \let\endtcb@savebox=\endtcb@vbox%
-    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable%
-    \let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable},
+    \tcb@init@breakability%
+    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable},
   breakable@unlimited/.code={%
-    \let\tcb@savebox=\tcb@vbox%
-    \let\endtcb@savebox=\endtcb@vbox%
-    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightUnlimited%
-    \let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable},
+    \tcb@init@breakability%
+    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightUnlimited},
   breakable/.style={breakable@#1},
   breakable/.default=true,%
   unbreakable/.style={breakable=false},%
   enforce breakable/.code={%
-    \let\tcb@savebox=\tcb@vbox%
-    \let\endtcb@savebox=\endtcb@vbox%
-    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable%
-    \let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable},
+    \tcb@init@breakability%
+    \let\tcb@defToTotalHeight=\tcb@defToTotalHeightBreakable},
   title after break/.store in=\kvtcb@followingtitle,%
   notitle after break/.style={title after break=},%
   adjusted title after break/.style={title after break={#1\vphantom{\kvtcb@adjusttext}}},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
index 819197e3b10..2c69a26a060 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbdocumentation.code.tex: Code for LaTeX documentations
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{listings,skins,xparse,external,raster}
 
@@ -878,10 +878,11 @@
   \tcb@doc@index@pgf@%
 }
 
-\let\tcb@doc@index@pgf=\tcb@doc@index@pgfsection%
+\let\tcb@doc@index@pgf=\tcb@doc@index@pgfsection
 
-\def\tcb@doc@index@doc{%
-  \ExplSyntaxOn
+
+\ExplSyntaxOn
+\def\tcb@doc@index@doc{
   \def \__tcobox_index_command:
   {
     \iftcb@doc@toindex
@@ -891,16 +892,16 @@
   \def \__tcobox_index_environment:
   {
     \iftcb@doc@toindex
-      SpecialMainEnvIndex{\kvtcb@doc@sortindex\idx@actual\tcbIndexPrintEnvC{\kvtcb@doc@index}}
+      \SpecialMainEnvIndex{\kvtcb@doc@sortindex\idx@actual\tcbIndexPrintEnvC{\kvtcb@doc@index}}
     \fi
   }
-  \ExplSyntaxOff
-  \tcbset{index german settings}%
-  \EnableCrossrefs%
-  \PageIndex%
+  \tcbset{index~german~settings}
+  \EnableCrossrefs
+  \PageIndex
 }
+\ExplSyntaxOff
 
-\def\tcb@doc@index@off{}%
+\def\tcb@doc@index@off{}
 
 \tcbset{%
   reset@documentation/.style={%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
index 20a12548014..b4dd73e40cc 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbexternal.code.tex: Code for externalization
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{pro@cessing}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
index 0808d0f4ef6..2240147a9e0 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbfitting.code.tex: Code for fit boxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \newdimen\tcbfitdim
 \newdimen\tcb@lowerfitdim
@@ -253,13 +253,10 @@
   %
   \def\tcb@fit@@boxsave##1{%
     \tcbdimto\tcb@innerwidth{\kvtcb@width-\kvtcb@left@rule-\kvtcb@right@rule}%
-    \colorlet{tcbcol@origin}{.}%
-    \tcb@set@color{tcbcolupper}%
     \begin{tcb@savebox}{\tcb@upperbox}{##1}%
-      \kvtcb@fontupper\fontsize{\tcbfitdim}{\tcb@fit@@line}\selectfont%
+      \color{tcbcolupper}\kvtcb@fontupper\fontsize{\tcbfitdim}{\tcb@fit@@line}\selectfont%
       \kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper%
     \end{tcb@savebox}%
-    \tcb@reset@color%
     \advance\count@ 1\relax%
   }%
   %
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
index 84720b1c852..63f1cd944b3 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbhooks.code.tex: Code for adding hooks
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbset{%
   before upper app/.code={\appto\kvtcb@before@upper{#1}},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
index 9ac64e3fd58..8604e6896f9 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcblistings.code.tex: Code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{listings}[2007/02/22]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
index 1b76e30fbe3..c0460a3c1e6 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcblistingscode.code.tex: Auxiliary code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{pro@cessing}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
index 99cdae4c73a..78eae82da93 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcblistingsutf8.code.tex: Code for colorboxes with listings in UTF-8
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{listings}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
index e339447ada4..297ecf5cb06 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbmagazine.code.tex: Code for box sets and magazine styles
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{breakable}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
index 073e2c7bb65..30a01ea7add 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbminted.code.tex: Code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{minted}[2011/09/17]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
index c8bb522923d..64f96c02511 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbposter.code.tex: Code for posters
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{breakable,magazine,skins,fitting}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
index c11451fe36e..88169a0b870 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbprocessing.code.tex: Code for conditional processing
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{pdftexcmds}
 \RequirePackage{shellesc}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
index 7492e2a677b..e6abad21ec1 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbskinsjigsaw.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \newcounter{tcbrastercolumn}
 \newcounter{tcbrasterrow}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
index 7297dc0e840..28cadb737af 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbskins.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{tikz}[2010/10/13]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
index ca7f8688276..b608e7c157c 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbskinsjigsaw.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{skins}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
index ae26c751b7f..2ee69469f31 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbtheorems.code.tex: Code for theorems in colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{amsmath}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
index 6dfef8c103d..71f6f5c32ea 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbvignette.code.tex: Code for ornamental frames
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \tcbuselibrary{skins}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
index d2f9c1b0887..7eaea506eef 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcbxparse.code.tex: Code for xparse features
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,14 +18,20 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.31}
+\tcb@set@library@version{4.32}
 
 \RequirePackage{xparse}[2013/12/31]
 
 \tcbset{%
   IfNoValueTF/.code n args={3}{\IfNoValueTF{#1}{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}},
+  IfNoValueT/.code n args={2}{\IfNoValueT{#1}{\pgfkeysalso{#2}}},
+  IfNoValueF/.code n args={2}{\IfNoValueF{#1}{\pgfkeysalso{#2}}},
   IfValueTF/.code n args={3}{\IfValueTF{#1}{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}},
+  IfValueT/.code n args={2}{\IfValueT{#1}{\pgfkeysalso{#2}}},
+  IfValueF/.code n args={2}{\IfValueF{#1}{\pgfkeysalso{#2}}},
   IfBooleanTF/.code n args={3}{\IfBooleanTF{#1}{\pgfkeysalso{#2}}{\pgfkeysalso{#3}}},
+  IfBooleanT/.code n args={3}{\IfBooleanT{#1}{\pgfkeysalso{#2}}},
+  IfBooleanF/.code n args={3}{\IfBooleanF{#1}{\pgfkeysalso{#2}}},
   verbatim/.style={fontupper=\ttfamily,nobeforeafter,tcbox raise base,top=0pt,bottom=0pt,left=1mm,right=1mm,boxrule=0.3mm}
 }
 
@@ -233,16 +239,10 @@
 \def\tcb@sbs@content@both{\box\tcb@upperbox\tcblower\box\tcb@lowerbox}
 
 \def\tcb@sbs@save@upper{%
-  \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcolupper}%
-  \sbox{\tcb@upperbox}{\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper\tcb@sbs@text@left\tcb@insert@after@upper}%
-  \tcb@reset@color%
+  \sbox{\tcb@upperbox}{\color{tcbcolupper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper\tcb@sbs@text@left\tcb@insert@after@upper}%
 }
 \def\tcb@sbs@save@lower{%
-  \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcollower}%
-  \sbox{\tcb@lowerbox}{\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower\tcb@sbs@text@right\tcb@insert@after@lower}%
-  \tcb@reset@color%
+  \sbox{\tcb@lowerbox}{\color{tcbcollower}\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower\tcb@sbs@text@right\tcb@insert@after@lower}%
 }
 
 \tcbset{%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
index 2af5529755e..a9347399084 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
+%% The LaTeX package tcolorbox - version 4.32 (2020/09/17)
 %% tcolorbox.sty: Text color boxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,8 +18,8 @@
 %% This work consists of all files listed in README
 %%
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{tcolorbox}[2020/07/31 version 4.31 text color boxes]
-\def\tcb@version{4.31}
+\ProvidesPackage{tcolorbox}[2020/09/17 version 4.32 text color boxes]
+\def\tcb@version{4.32}
 
 \RequirePackage{pgf}[2008/01/15]
 \RequirePackage{verbatim}[2003/08/22]
@@ -400,7 +400,7 @@
   halign title/center/.code={\let\kvtcb@haligntitle=\tcb@raggedcenter@plain},
   halign title/justify/.code={\let\kvtcb@haligntitle=\@empty},
   %
-  valign scale limit/.store in=\kvtcbv@valignscalelimit,
+  valign scale limit/.store in=\kvtcb@valignscalelimit,
   valign scale limit=1.1,
   valign/.is choice,
   valign/top/.code={\def\kvtcb@valignupper{top}},
@@ -815,10 +815,10 @@
 \let\endtcb@savebox=\endtcb@lrbox
 
 \def\tcb@saveupperbox{%
-\begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper}
+\begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\color{tcbcolupper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper}
 
 \def\tcb@savelowerbox{%
-\begin{tcb@savebox}{\tcb@lowerbox}{\tcb@w@lower}\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower}
+\begin{tcb@savebox}{\tcb@lowerbox}{\tcb@w@lower}\color{tcbcollower}\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower}
 
 
 % counter for float
@@ -911,24 +911,12 @@
   \fi%
 }
 
-\def\tcb@set@color#1{%
-  \edef\current@color{\@nameuse{\string\color@#1}}%
-  \colorlet{.}{#1}%
-}
-
-\def\tcb@reset@color{%
-  \colorlet{.}{tcbcol@origin}%
-  \edef\current@color{\@nameuse{\string\color@tcbcol@origin}}%
-}
-
 \def\tcb@set@@upper@and@lower{%
-  \colorlet{tcbcol@origin}{.}%
   \let\tcb@insert@after@part=\tcb@insert@after@upper%
   % switch for lower box
   \def\tcblower{%
     \tcb@insert@after@part%
     \end{tcb@savebox}%
-    \tcb@set@color{tcbcollower}%
     \unless\iftcb@sidebyside%
       \tcbdimto\tcb@w@lower{\tcb@innerwidth-\kvtcb@boxsep*2-\kvtcb@leftlower-\kvtcb@rightlower}%
     \fi%
@@ -943,7 +931,6 @@
     \fi%
     \tcb@startbox}%
   % start of upper box
-  \tcb@set@color{tcbcolupper}%
   \ifx\kvtcb@saveupperto\@empty%
     \let\tcb@startbox\tcb@saveupperbox%
     \let\endtcolorbox\tcb@endboxanddraw%
@@ -1130,13 +1117,11 @@
 \def\tcb@endboxanddraw{%
   \tcb@insert@after@part%
   \end{tcb@savebox}%
-  \tcb@reset@color%
   \tcb@draw@color@box%
   \tcb@finalize@environment%
 }
 
 \def\tcb@finalize@environment{%
-  %\color{.}% hack for some special cases
   \tcb@layer@dec%
 }
 
@@ -1271,11 +1256,11 @@
   \iftcb@lowerspace\tcb@ch@fixed@both\else\tcb@ch@fixed@upper\fi%
 }
 
-\def\tcb@dbox@top#1#2#3#4#5{\pgftext[x=#1,y=#2+#3,left,top]{\color{#5}\box#4}}%
+\def\tcb@dbox@top#1#2#3#4#5{\pgftext[x=#1,y=#2+#3,left,top]{#5}}
 
-\def\tcb@dbox@bottom#1#2#3#4#5{\pgftext[x=#1,y=#2,left,bottom]{\color{#5}\box#4}}%
+\def\tcb@dbox@bottom#1#2#3#4#5{\pgftext[x=#1,y=#2,left,bottom]{#5}}
 
-\def\tcb@dbox@center#1#2#3#4#5{\pgftext[x=#1,y=#2+#3/2,left]{\color{#5}\box#4}}%
+\def\tcb@dbox@center#1#2#3#4#5{\pgftext[x=#1,y=#2+#3/2,left]{#5}}
 
 \def\tcb@resize@box#1#2#3{%
   \setbox#1\hbox{\resizebox*{#2}{#3}{\box#1}}%
@@ -1289,18 +1274,18 @@
     \tcbdimto\tcb@box@h@target{#3}%
     \tcb@resize@box{#4}{\tcb@box@w@target}{\tcb@box@h@target}%
   \fi%
-  \pgftext[x=#1,y=#2+#3,left,top]{\color{#5}\box#4}}%
+  \pgftext[x=#1,y=#2+#3,left,top]{#5}}%
 
 \def\tcb@dbox@resizelimited#1#2#3#4#5{%
   \iftcb@fixedheight%
     \tcbdimto\tcb@box@w@target{\wd#4}%
-    \tcbdimto\tcb@box@h@target{\kvtcbv@valignresizelimit\dimexpr(\ht#4+\dp#4)}%
+    \tcbdimto\tcb@box@h@target{\kvtcb@valignscalelimit\dimexpr(\ht#4+\dp#4)}%
     \ifdim\dimexpr\tcb@box@h@target>#3\relax%
       \tcbdimto\tcb@box@h@target{#3}%
     \fi%
     \tcb@resize@box{#4}{\tcb@box@w@target}{\tcb@box@h@target}%
   \fi%
-  \pgftext[x=#1,y=#2+#3,left,top]{\color{#5}\box#4}}%
+  \pgftext[x=#1,y=#2+#3,left,top]{#5}}%
 
 \let\tcb@pgfprocess@@specialround@orig=\pgfprocess@@specialround
 
@@ -1566,7 +1551,7 @@
     \pgfsetfillopacity{\kvtcb@opacitytitle}%
     \pgftext[x=\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@lefttitle\relax,
              y=\the\dimexpr\tcb@height-\kvtcb@top@rule-\kvtcb@boxsep-\kvtcb@toptitle\relax,
-             left,top]{\color{tcbcoltitle}\box\tcb@titlebox}%
+             left,top]{\box\tcb@titlebox}%
     \end{pgfscope}%
   \fi\fi%
 }
@@ -1578,7 +1563,9 @@
     \pgfsetfillopacity{\kvtcb@opacityupper}%
     \csname tcb@dbox@\kvtcb@valignupper\endcsname{\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@leftupper\relax}%
             {\the\dimexpr\tcb@innerheight+\kvtcb@bottom@rule-\kvtcb@boxsep-\tcb@break@topsep-\kvtcb@top-\tcb@height@upper\relax}%
-            {\tcb@height@upper}{\tcb@upperbox}{tcbcolupper}%
+            {\tcb@height@upper}{\tcb@upperbox}{%
+              \color@begingroup\tcb@upperdraw@begin@hook\box\tcb@upperbox\tcb@upperdraw@end@hook\color@endgroup%
+            }%
     \end{pgfscope}%
   \fi%
 }
@@ -1590,7 +1577,9 @@
     \pgfsetfillopacity{\kvtcb@opacitylower}%
     \csname tcb@dbox@\kvtcb@valignlower\endcsname{\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@leftlower\relax}%
             {\the\dimexpr\kvtcb@bottom@rule+\kvtcb@boxsep+\tcb@break@bottomsep+\kvtcb@bottom\relax}%
-            {\tcb@height@lower}{\tcb@lowerbox}{tcbcollower}%
+            {\tcb@height@lower}{\tcb@lowerbox}{%
+              \color@begingroup\tcb@lowerdraw@begin@hook\box\tcb@lowerbox\tcb@lowerdraw@end@hook\color@endgroup%
+            }%
     \end{pgfscope}%
   \fi%
 }
@@ -1621,7 +1610,7 @@
     \fi%
     \iftcb@hasLower%
       \tcb@box@align{\tcb@lowerbox}%
-      \iftcb@lowervisible\leavevmode\color{tcbcollower}\unhbox\tcb@lowerbox%
+      \iftcb@lowervisible\leavevmode\unhbox\tcb@lowerbox%
       \else%
         \iftcb@lowerignored\else\rule[-\dp\tcb@lowerbox]{\z@}{\the\dimexpr\ht\tcb@lowerbox+\dp\tcb@lowerbox\relax}\fi%
       \fi%
@@ -1763,10 +1752,7 @@
 \long\def\tcbox@inner@hbox#1{%
   \tcbset{breakable@false,sidebyside=false}%
   \tcb@set@@phantom%
-  \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcolupper}%
-  \sbox\tcb@upperbox{\tcb@embed@tcbox{\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper}}%
-  \tcb@reset@color%
+  \sbox\tcb@upperbox{\tcb@embed@tcbox{\color{tcbcolupper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper}}%
   \tcbdimto\tcb@val@raisebase{\the\dimexpr\dp\tcb@upperbox+\kvtcb@bottom+\kvtcb@boxsep+\kvtcb@bottom@rule@stand+\kvtcb@bbbottom@stand\relax}%
   \tcbdimto\kvtcb@width{\wd\tcb@upperbox+\kvtcb@left@rule+\kvtcb@leftupper+\kvtcb@boxsep*2+\kvtcb@rightupper+\kvtcb@right@rule}%
   \tcb@hasLowerfalse%
@@ -1781,10 +1767,7 @@
   \tcb@set@@phantom%
   \tcb@set@@title%
   \tcb@set@@dimensions%
-  \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcolupper}%
-  \begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper\end{tcb@savebox}%
-  \tcb@reset@color%
+  \begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\color{tcbcolupper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper\end{tcb@savebox}%
   \tcb@hasLowerfalse%
   \tcb@draw@color@box%
 }
@@ -2162,8 +2145,15 @@
 \tcbset{%
   initialize@reset/.code={\tcbset{#1}\appto\tcb@reset{\tcbset{#1}}},%
   reset/.code={\tcb@reset},%
-  reset@core/.style={code={\let\tcbtitletext\@empty\tcb@attach@title@code@%
-    \let\tcb@lateoptions@hook\@empty},
+  reset@core/.style={code={%
+      \let\tcbtitletext\@empty%
+      \tcb@attach@title@code@%
+      \let\tcb@lateoptions@hook\@empty%
+      \let\tcb@upperdraw@begin@hook\@empty%
+      \let\tcb@upperdraw@end@hook\@empty%
+      \let\tcb@lowerdraw@begin@hook\@empty%
+      \let\tcb@lowerdraw@end@hook\@empty%
+    },
     width=\linewidth,autoparskip,arc is curved,
     natural height,height plus=0pt,space to lower,valign=top,valign lower=top,
     size=normal,rounded corners,parfillskip restore,