tcolorbox (31jul20)

git-svn-id: svn://tug.org/texlive/trunk@56009 c570f23f-e606-0410-a88d-b1316a301751

19 files changed, 128 insertions, 110 deletions

diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
index 0a3145d2150..4f3eb68f926 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbbreakable.code.tex: Code for breakable colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,16 +17,16 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \let\tcb@parboxrestore@true=\tcb@parboxrestore
 \let\tcb@parboxrestore@false\tcb@parbox@false@settings
 
 % total height for boxes smaller than 0.4375\maxdimen and 0.4375\maxdimen else (ca 2.5m)
 \def\tcb@defToTotalHeightBreakable#1#2{%
-  \ifnum\ht#2<0 %
+  \ifnum\ht#2<0\relax%
     \edef#1{7168pt}%
-  \else\ifnum\ht#2<469762048 %
+  \else\ifnum\ht#2<469762048\relax%
     \tcbdimto#1{\ht#2+\dp#2}%
   \else%
     \edef#1{7168pt}%
@@ -106,12 +106,12 @@
   \ifdim\tcb@breakat@dim>0pt\relax%
     \tcbdimto\tcb@h@page{\tcb@breakat@dim-\kvtcb@shrinkbreakgoal}%
   \else%
-    \ifx\kvtcb@float\@empty%
+    \ifx\kvtcb@float\@empty\relax%
       \iftcb@multicol%
         \ifnum\c@tcbbreakpart>1\relax%
           \tcbdimto\tcb@h@page{\@colroom}%
         \else%
-          \ifdim\pagegoal=16383.99998pt
+          \ifdim\pagegoal=16383.99998pt\relax%
             \tcbdimto\tcb@h@page{\@colroom}%
           \else%
             \@tempdima\pagetotal%
@@ -120,7 +120,7 @@
           \fi%
         \fi%
       \else%
-        \ifdim\pagegoal=16383.99998pt
+        \ifdim\pagegoal=16383.99998pt\relax%
           \tcbdimto\tcb@h@page{\vsize}% detects floating objects
         \else%
           \tcb@comp@compress%
@@ -162,7 +162,7 @@
 }
 
 \def\tcb@following@title{%
-  \ifx\kvtcb@followingtitle\@empty%
+  \ifx\kvtcb@followingtitle\@empty\relax%
     \tcb@hasTitlefalse%
     \let\tcb@h@title=\tcb@zpt%
     \let\tcb@h@padtitle=\tcb@zpt%
@@ -189,7 +189,7 @@
 \def\tcb@enlbreak@next@scan#1/#2@{%
   \def\temp@a{#2}%
   \tcbdimto\tcb@enlbreak@dim{#1}%
-  \ifx\temp@a\@empty%
+  \ifx\temp@a\@empty\relax%
     \let\tcb@enlbreak@next=\tcb@enlbreak@next@final%
   \else%
      \edef\tcb@enlbreak@seq{\temp@a @}%
@@ -212,7 +212,7 @@
 \def\tcb@breakat@next@scan#1/#2@{%
   \def\temp@a{#2}%
   \tcbdimto\tcb@breakat@dim{#1}%
-  \ifx\temp@a\@empty%
+  \ifx\temp@a\@empty\relax%
     \let\tcb@breakat@next=\@empty%
   \else%
      \edef\tcb@breakat@seq{\temp@a @}%
@@ -264,12 +264,12 @@
   \setcounter{tcbbreakpart}{0}%
   \let\tcb@nobreak@warning\@empty%
   \@ifundefined{columnbreak}{\tcb@multicolfalse}{%
-    \ifnum\doublecol@number>\z@ %
+    \ifnum\doublecol@number>\z@\relax%
       \tcb@multicoltrue%
     \else%
       \tcb@multicolfalse%
     \fi}%
-  \ifx\kvtcb@float\@empty%
+  \ifx\kvtcb@float\@empty\relax%
     \iftcb@nobreak{%
       \let\tcb@nobreak@warning\tcb@do@nobreak@warning%
       \iftcb@ignorenobreak%
@@ -318,7 +318,7 @@
     \tcb@split@start%
   \endgroup%
   \color{.}% hack for some special cases
-  \ifx\kvtcb@float\@empty%
+  \ifx\kvtcb@float\@empty\relax%
     \aftergroup\tcb@use@after@lastbox%
   \fi%
 }
@@ -514,7 +514,7 @@
 
 \def\tcb@split@first{%
   \setcounter{tcbbreakpart}{1}%
-  \ifx\kvtcb@float\@empty%
+  \ifx\kvtcb@float\@empty\relax%
     \iftcb@vfillbeforefirst%
       \let\tcb@before@first=\vfill%
     \else%
@@ -636,7 +636,8 @@
 
 \def\tcb@split@force@last{%
   \tcb@split@setstate@last%
-  \ifdim\tcb@h@total>\tcb@h@page%
+  \ifdim\tcb@h@total>\tcb@h@page\relax%
+    \gdef\tcb@after@lastbox{\clearpage}%
     \tcbdimto\kvtcb@bbbottom{\kvtcb@bbbottom+\tcb@h@page-\tcb@h@total}%
   \fi%
 }
@@ -978,7 +979,7 @@
   compress page/all/.code={\def\tcb@comp@compress{\def\tcb@compress@height{\pageshrink-1sp}}},%
   compress page/none/.code={\def\tcb@comp@compress{\let\tcb@compress@height\tcb@zpt}},%
   compress page/baselineskip/.code={\def\tcb@comp@compress{%
-    \ifdim\pageshrink>\baselineskip%
+    \ifdim\pageshrink>\baselineskip\relax%
       \let\tcb@compress@height\baselineskip%
     \else%
       \def\tcb@compress@height{\pageshrink-1sp}%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
index 49c70baefb5..819197e3b10 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbdocumentation.code.tex: Code for LaTeX documentations
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \tcbuselibrary{listings,skins,xparse,external,raster}
 
@@ -487,7 +487,7 @@
         \seq_gput_left:NV \g__tcobox_label_seq \kvtcb@doc@label
       }
     {\ttfamily\kvtcb@doc@parameter}\par
-    \strut\nobreakspace\nobreakspace\meta{\kvtcb@text@envcontent}\par
+    \strut{\ttfamily\nobreakspace\nobreakspace}\meta{\kvtcb@text@envcontent}\par
     \strut\cs{end}\brackets{\__tcobox_print_environment:}
     \tcb@doc@do@description
   }
@@ -808,7 +808,7 @@
 \NewDocumentCommand\tcb@ref@doc{msm}{%
   \hyperref[#1:#3]{\texttt{\ref*{#1:#3}}%
   \IfBooleanTF{#2}{}{%
-    \ifnum\getpagerefnumber{#1:#3}=\thepage%
+    \ifnum\getpagerefnumber{#1:#3}=\thepage\relax%
     \else%
       \textsuperscript{\ding{213}\,\kvtcb@text@pageshort\,\pageref*{#1:#3}}%
     \fi}}%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
index ebf274f9b01..20a12548014 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbexternal.code.tex: Code for externalization
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \tcbuselibrary{pro@cessing}
 
@@ -217,8 +217,8 @@
   clear preamble/.code={\def\tcbexternal@preamble{}},
   preclass/.code={\appto\tcbexternal@preclass{#1}},
   clear preclass/.code={\def\tcbexternal@preclass{}},
-  PassOptionsToPackage/.code 2 args={\appto\tcbexternal@preclass{\PassOptionsToPackage{#1}{#2}}},
-  PassOptionsToClass/.code 2 args={\appto\tcbexternal@preclass{\PassOptionsToClass{#1}{#2}}},
+  PassOptionsToPackage/.code n args={2}{\appto\tcbexternal@preclass{\PassOptionsToPackage{#1}{#2}}},
+  PassOptionsToClass/.code n args={2}{\appto\tcbexternal@preclass{\PassOptionsToClass{#1}{#2}}},
   externalize/.code={},
   -/.style={/tcb/external/externalize=false},
   %
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
index cf641991bed..0808d0f4ef6 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \newdimen\tcbfitdim
 \newdimen\tcb@lowerfitdim
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
index 135d78236e6..84720b1c852 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 aedb6eb1435..9ac64e3fd58 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 a241e3e3c18..1b76e30fbe3 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \tcbuselibrary{pro@cessing}
 
@@ -178,11 +178,11 @@
 \tcbset{%
   listing file/.store in=\kvtcb@listingfile,%
   comment/.store in=\kvtcb@listingcomment,%
-  listing@process@inside/.code 2 args={%
+  listing@process@inside/.code n args={2}{%
     \let\tcb@inputlisting\tcb@inputlisting@inside%
     \let\tcb@listing@process=#1%
     \let\tcb@use@listing@other=#2},%
-  listing@process@outside/.code 2 args={%
+  listing@process@outside/.code n args={2}{%
     \let\tcb@inputlisting=#1%
     \let\tcb@use@listing@other=#2},%
   listing only/.style={listing@process@inside={\tcb@listing@listing}{\tcbuselistingtext}},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
index fa62475ca16..99cdae4c73a 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 444c3867aae..e339447ada4 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 e5574ff6691..073e2c7bb65 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 712095687b0..c8bb522923d 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbposter.code.tex: Code for posters
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \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 522d1469ffa..c11451fe36e 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbprocessing.code.tex: Code for conditional processing
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \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 faf8c7cc31e..7492e2a677b 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \newcounter{tcbrastercolumn}
 \newcounter{tcbrasterrow}
@@ -193,7 +193,7 @@
     \color@vbox%
     \hsize=\tcb@raster@width%
     \let\tcb@end@raster\color@endbox%
-  \fi\fi%&
+  \fi\fi%
   \if@nobreak%
     \iftcb@ignorenobreak%
       {\par\nointerlineskip%
@@ -206,7 +206,7 @@
   \tcb@parfillskip@check\kvtcb@raster@halign\noindent%
 }{%
   \ifhmode\unskip\fi%
-  \ifnum\c@tcbrastercolumn>1 %
+  \ifnum\c@tcbrastercolumn>1\relax%
     \kern\tcb@raster@skip@right%
   \fi%
   \begingroup%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
index cf0dc29e966..7297dc0e840 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \RequirePackage{tikz}[2010/10/13]
 
@@ -29,7 +29,7 @@
   \begin{scope}[every node/.style={line width=0mm,inner sep=0mm,outer sep=0mm,draw=none,fill=none,rectangle}]
     \node[name=frame,at={(0,0)},above right,minimum width=\tcb@width,minimum height=\tcb@height]{};
     \node[name=interior,at={({\kvtcb@left@rule},{\kvtcb@bottom@rule})},above right,minimum width=\tcb@innerwidth,minimum height=\tcb@innerheight]{};
-    \ifnum\tcbsegmentstate=1%
+    \ifnum\tcbsegmentstate=1\relax%
     \node[name=segmentation,at={({\kvtcb@left@rule},{\the\dimexpr\kvtcb@bottom@rule+\kvtcb@boxsep*2+\tcb@break@bottomsep+\kvtcb@bottom+\tcb@height@lower\relax})},above right,
        minimum width=\tcb@innerwidth,minimum height=\the\dimexpr\kvtcb@middle*2\relax]{};
     \else\iftcb@sidebyside%
@@ -652,7 +652,7 @@
   frame engine=path,interior titled engine=empty,interior engine=empty,segmentation engine=empty,title engine=path,%
   interior titled code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1%
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@UT%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithtitle@path}%
@@ -663,7 +663,7 @@
     \tcb@drawspec@T\tcb@spec{}},
   interior code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@UR%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithouttitle@path}%
@@ -680,7 +680,7 @@
   frame engine=pathfirst,interior titled engine=empty,interior engine=empty,segmentation engine=empty,title engine=pathfirst,%
   interior titled code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1%
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@UT%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithtitle@pathfirst}%
@@ -691,7 +691,7 @@
     \tcb@drawspec@T\tcb@spec{}},%
   interior code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@UR%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithouttitle@pathfirst}%
@@ -706,7 +706,7 @@
   frame engine=pathmiddle,interior titled engine=empty,interior engine=empty,segmentation engine=empty,title engine=pathmiddle,%
   interior titled code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1%
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@UT%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithtitle@pathmiddle}%
@@ -717,7 +717,7 @@
     \tcb@drawspec@T\tcb@spec{}},%
   interior code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@US%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithouttitle@pathmiddle}%
@@ -743,7 +743,7 @@
     \tcb@drawspec@T\tcb@spec{}},%
   interior code={%
     \iftcb@lowerseparated%
-      \ifnum\tcbsegmentstate=1
+      \ifnum\tcbsegmentstate=1\relax%
       \tcb@spec{beamer@color}\tcb@drawspec@US%
       \else%
       {\tcb@spec{beamer@color}\tcb@drawwithouttitle@pathlast}%
@@ -1021,13 +1021,13 @@
     \ifdim\dimexpr\kvtcb@yinnershift@boxedtitle<0pt\relax\let\kvtcb@yinnershift@boxedtitle\tcb@zpt\fi%
   }},
   boxtitle/adapt@top/.code={%
-    \ifdim\dimexpr\tcboxedtitleheight+\kvtcb@yshift@boxedtitle>0pt\relax
+    \ifdim\dimexpr\tcboxedtitleheight+\kvtcb@yshift@boxedtitle>0pt\relax%
       \tcbdimto\kvtcb@bbtop@stand{\kvtcb@bbtop@stand+\tcboxedtitleheight+\kvtcb@yshift@boxedtitle}%
     \fi%
     \tcbdimto\kvtcb@top{\kvtcb@top-\kvtcb@yinnershift@boxedtitle}%
   },
   boxtitle/adapt@bottom/.code={%
-    \ifdim\dimexpr\tcboxedtitleheight-\kvtcb@yshift@boxedtitle>0pt\relax
+    \ifdim\dimexpr\tcboxedtitleheight-\kvtcb@yshift@boxedtitle>0pt\relax%
       \tcbdimto\kvtcb@bbbottom@stand{\kvtcb@bbbottom@stand+\tcboxedtitleheight-\kvtcb@yshift@boxedtitle}%
     \fi%
     \tcbdimto\kvtcb@bottom{\kvtcb@bottom+\kvtcb@yinnershift@boxedtitle}%
@@ -1103,7 +1103,7 @@
 
 \def\tcb@setratio#1#2#3{\edef#1{\strip@pt\dimexpr\number\numexpr\number\dimexpr#2\relax*65536/\number\dimexpr#3\relax\relax sp\relax}}
 
-\def\tcb@setratiorobust#1#2#3{\ifdim\dimexpr#3<1pt\tcb@setratio#1{#2}{1pt}\else\tcb@setratio#1{#2}{#3}\fi}
+\def\tcb@setratiorobust#1#2#3{\ifdim\dimexpr#3<1pt\relax\tcb@setratio#1{#2}{1pt}\else\tcb@setratio#1{#2}{#3}\fi}
 
 \def\tcb@comp@waterbox@stretch#1#2#3{%
   \tcb@setratiorobust\tcb@scale@x{#1\dimexpr#2}{\wd\tcb@waterbox}%
@@ -1288,10 +1288,10 @@
     \pgfutil@loop%
       \pgfutil@loop%
         \pgftext[x=\pgf@xc,y=\pgf@yc,left,top]{\copy\tcb@waterbox}%
-        \ifdim\pgf@xc<\pgf@xb%
+        \ifdim\pgf@xc<\pgf@xb\relax%
         \advance\pgf@xc\tcb@ppbb@tilew%
       \pgfutil@repeat%
-      \ifdim\pgf@yc>\pgf@ya%
+      \ifdim\pgf@yc>\pgf@ya\relax%
       \advance\pgf@yc-\tcb@ppbb@tileh%
       \pgf@xc\pgf@xa%
     \pgfutil@repeat%
@@ -1484,7 +1484,7 @@
 
 
 \def\tcb@shadow@comp@ts@smart#1#2{%
-  \ifdim#2>0pt\relax\tcbdimto\tcb@shadow@ts{#1-#2/2}%%
+  \ifdim#2>0pt\relax\tcbdimto\tcb@shadow@ts{#1-#2/2}%
   \else\tcbdimto\tcb@shadow@ts{#1+#2/2}\fi%
 }
 
@@ -1806,16 +1806,24 @@
 \def\tcb@set@pdfpages#1#2{%
   \IfFileExists{#2}{%
     \ifdef{\pdfximage}{%
+      % pdftex
       \pdfximage{#2}%
       \edef#1{\the\pdflastximagepages}%
     }{%
-      \ifdef{\XeTeXpdfpagecount}{%
-        \edef#1{\the\XeTeXpdfpagecount #2 }%
-        \ifnum#1=0 %
-          \edef#1{1}%
-        \fi%
-      }{\tcb@error{For PDF support run pdflatex, xelatex, or lualatex}{%
-        Your compiler seems not to support PDF include files.}}%
+      \ifdef{\saveimageresource}{%
+        % luatex
+        \saveimageresource{#2}%
+        \edef#1{\the\lastsavedimageresourcepages}%
+      }{%
+        \ifdef{\XeTeXpdfpagecount}{%
+          % xetex
+          \edef#1{\the\XeTeXpdfpagecount #2 }%
+          \ifnum#1=0\relax%
+            \edef#1{1}%
+          \fi%
+        }{\tcb@error{For PDF support run pdflatex, xelatex, or lualatex}{%
+          Your compiler seems not to support PDF include files.}}%
+      }%
     }%
   }{\tcb@error{PDF file `#2' not found}{The PDF file `#2' was not found}}%
   \relax%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
index 6bcd0fef7e7..ca7f8688276 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \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 c158bdd77b0..ae26c751b7f 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% 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{4.30}
+\tcb@set@library@version{4.31}
 
 \RequirePackage{amsmath}
 
@@ -106,7 +106,7 @@
   terminator sign dash/.style={terminator sign={\ --}},%
   terminator sign none/.style={terminator sign=},%
   label separator/.store in=\kvtcb@label@sep,%
-  description delimiters/.code 2 args={\def\kvtcb@desc@delim@left{#1}\def\kvtcb@desc@delim@right{#2}},%
+  description delimiters/.code n args={2}{\def\kvtcb@desc@delim@left{#1}\def\kvtcb@desc@delim@right{#2}},%
   description delimiters parenthesis/.style={description delimiters=()},
   description delimiters none/.style={description delimiters={}{}},
   description color/.code={\def\temp@a{#1}\ifx\temp@a\@empty\relax%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
index dbc07bdf1ed..6dfef8c103d 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbvignette.code.tex: Code for ornamental frames
 %%
 %% -------------------------------------------------------------------------------------------
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \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 13daf19c848..d2f9c1b0887 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcbxparse.code.tex: Code for xparse features
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.30}
+\tcb@set@library@version{4.31}
 
 \RequirePackage{xparse}[2013/12/31]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
index 5a0f6214f8a..2af5529755e 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 4.30 (2020/04/28)
+%% The LaTeX package tcolorbox - version 4.31 (2020/07/31)
 %% tcolorbox.sty: Text color boxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,8 +18,8 @@
 %% This work consists of all files listed in README
 %%
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{tcolorbox}[2020/04/28 version 4.30 text color boxes]
-\def\tcb@version{4.30}
+\ProvidesPackage{tcolorbox}[2020/07/31 version 4.31 text color boxes]
+\def\tcb@version{4.31}
 
 \RequirePackage{pgf}[2008/01/15]
 \RequirePackage{verbatim}[2003/08/22]
@@ -666,11 +666,11 @@
   void/.style={capture=v@@d,capture/.code=,options@for/.code=,code={\def\tcbinputlisting@core{}}},
   nirvana/.code={\let\tcb@draw@color@box\@empty},
   check odd page/.is if=tcb@checkpage,
-  if odd page/.code 2 args={%
+  if odd page/.code n args={2}{%
     \tcbset{check odd page}%
     \tcbifoddpage{\tcbset{#1}}{\tcbset{#2}}%
   },
-  if odd page or oneside/.code 2 args={%
+  if odd page or oneside/.code n args={2}{%
     \tcbset{check odd page}%
     \tcbifoddpageoroneside{\tcbset{#1}}{\tcbset{#2}}%
   },
@@ -828,7 +828,7 @@
     {\edef\ftype@tcbfloat{\the\c@float@type}%
      \addtocounter{float@type}{\value{float@type}}}%
 \def\c@tcbfloat{\c@float@type}% tricking the caption package
-\ifdim\parskip>\z@%
+\ifdim\parskip>\z@\relax%
   \tcbset{autoparskip/.style=parskip}%
 \else%
   \tcbset{autoparskip/.style=noparskip}%
@@ -1043,7 +1043,7 @@
       \newbox\tcb@temp%
       \cslet{tcb@footnote@\romannumeral\c@tcblayer}{\tcb@temp}%
       \tcbset{every box on layer \number\c@tcblayer/.style={reset,every box}}
-    \ifnum\c@tcblayer<#1\repeat%
+    \ifnum\c@tcblayer<#1 \repeat%
   \else%
   \fi%
   \xdef\tcb@managed@layers@max{#1}%
@@ -1061,12 +1061,12 @@
 \def\tcb@layer@inc{%
   \tcb@count@boxes%
   \stepcounter{tcblayer}%
-  \ifnum\c@tcblayer>1%
+  \ifnum\c@tcblayer>1\relax%
     \tcbset{breakable@true/.code=}%
   \else%
     \ifinner\ifhmode\tcbset{breakable@true/.code=}\fi\fi%
   \fi%
-  \ifnum\c@tcblayer>\tcb@managed@layers@max%
+  \ifnum\c@tcblayer>\tcb@managed@layers@max\relax%
     \tcbset{every box on higher layers}%
   \else%
     \expandafter\setbox\csname tcb@footnote@\romannumeral\c@tcblayer\endcsname\box\@mpfootins%
@@ -1079,12 +1079,12 @@
   \tcb@count@boxes%
   \global\advance\c@tcolorbox@number by -1\relax%
   \stepcounter{tcblayer}%
-  \ifnum\c@tcblayer>1%
+  \ifnum\c@tcblayer>1\relax%
     \tcbset{breakable@true/.code=}%
   \else%
     \ifinner\ifhmode\tcbset{breakable@true/.code=}\fi\fi%
   \fi%
-  \ifnum\c@tcblayer>\tcb@managed@layers@max%
+  \ifnum\c@tcblayer>\tcb@managed@layers@max\relax%
     \tcbset{every box on higher layers}%
     \tcbset{every box on higher layers/.code=}%
   \else%
@@ -1095,7 +1095,7 @@
 }
 
 \def\tcb@layer@dec{%
-  \ifnum\c@tcblayer>\tcb@managed@layers@max%
+  \ifnum\c@tcblayer>\tcb@managed@layers@max\relax%
   \else%
     \expandafter\global\setbox\@mpfootins\box\csname tcb@footnote@\romannumeral\c@tcblayer\endcsname%
     \setcounter{mpfootnote}{\csname tcb@footnote@cnt@\romannumeral\c@tcblayer\endcsname}%
@@ -1179,22 +1179,31 @@
   \immediate\write\@auxout{\string\csgdef{tcb@space@#1}{#2}}%
 }
 
-\def\tcb@ch@fixed@spacesave{%
-  \tcbdimto\tcb@space{\tcb@space+\tcbheightspace}%
-  \ifdim\dimexpr\tcb@space<0pt\relax
-    \let\tcb@space\tcb@zpt%
-  \else%
-    \ifdim\dimexpr\tcb@space>\tcb@height\relax
-      \let\tcb@space\tcb@height%
-    \fi%
-  \fi%
-  \begingroup\edef\x{\endgroup\noexpand\tcb@savespace{\thetcolorboxnumber}{\tcb@space}}\x%
-  \tcbdimto\tcb@height@upper{\ht\tcb@upperbox+\dp\tcb@upperbox+\tcbheightspace}%
-  \let\tcbheightspace\tcb@zpt%
-  \iftcb@lowerspace%
-  \tcbdimto\tcb@height@lower{\ht\tcb@lowerbox+\dp\tcb@lowerbox}%
-  \fi%
-}
+
+\ExplSyntaxOn
+\def\tcb@ch@fixed@spacesave
+  {
+    \fp_set:Nn \l_tmpa_fp { \tcb@space+\tcbheightspace }
+    \fp_compare:nTF { \l_tmpa_fp < 0 }
+      {
+        \fp_zero_new:N \l_tmpa_fp
+      }
+      {
+        \fp_compare:nT { \l_tmpa_fp > \tcb@height }
+          {
+            \fp_set:Nn \l_tmpa_fp { \tcb@height }
+          }
+      }
+    \tcbdimto\tcb@space { \fp_to_dim:n { trunc(\l_tmpa_fp,2) } }
+    \use:x { \exp_not:N\tcb@savespace{\thetcolorboxnumber}{\tcb@space} }
+    \tcbdimto\tcb@height@upper{\ht\tcb@upperbox+\dp\tcb@upperbox+\tcbheightspace}
+    \let\tcbheightspace\tcb@zpt
+    \iftcb@lowerspace
+      \tcbdimto\tcb@height@lower{\ht\tcb@lowerbox+\dp\tcb@lowerbox}
+    \fi
+  }
+\ExplSyntaxOff
+
 
 \def\tcb@ch@fixed@split{%
   \tcbdimto\tcb@height@space{\tcbheightspace+\ht\tcb@upperbox+\dp\tcb@upperbox+\ht\tcb@lowerbox+\dp\tcb@lowerbox}%
@@ -1859,8 +1868,8 @@
   list type/.store in=\kvtcb@new@listtype,
   %
   init@hook@clear/.code={\def\kvtcb@init@hook{}},
-  crefname/.code 2 args={\begingroup\edef\x{\endgroup\noexpand\crefname{\tcb@new@boxname}}\x{#1}{#2}\tcb@new@label@type},
-  Crefname/.code 2 args={\begingroup\edef\x{\endgroup\noexpand\Crefname{\tcb@new@boxname}}\x{#1}{#2}\tcb@new@label@type},
+  crefname/.code n args={2}{\begingroup\edef\x{\endgroup\noexpand\crefname{\tcb@new@boxname}}\x{#1}{#2}\tcb@new@label@type},
+  Crefname/.code n args={2}{\begingroup\edef\x{\endgroup\noexpand\Crefname{\tcb@new@boxname}}\x{#1}{#2}\tcb@new@label@type},
   %
   blend into/.is choice,%
   blend into/figures/.style={use counter*=figure,list inside=lof,/tcb/code={\appto\tcb@new@colopt{,before title={\tcb@blend@beforetitle{\fnum@figure}}}}},%