CTAN sync 202101150305

4 files changed, 54 insertions, 54 deletions

diff --git a/macros/luatex/optex/demo/op-demo.tex b/macros/luatex/optex/demo/op-demo.tex
index ea1dd5b65d..c116682e59 100644
--- a/macros/luatex/optex/demo/op-demo.tex
+++ b/macros/luatex/optex/demo/op-demo.tex
@@ -1,4 +1,4 @@
-%% This is part of OpTeX project, see http://petr.olsak.net/optex
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
 
 \fontfam[LMfonts]              % Default font family: Latin Modern
 
@@ -8,7 +8,7 @@
 \hyperlinks \Blue\Blue         % active hyperlinks
 \activettchar`                 % in-text verbatim by `...`
 \everyintt={\Red}              % in-text verbatim Red
-\enquotes                      % use \"text" for English quotation  
+\enquotes                      % use \"text" for English quotation
 
 \tit Demonstration
 
@@ -37,7 +37,7 @@ The subsection text\dots
 
 \sec References
 
-There is a numbered equation. 
+There is a numbered equation.
 The number is auto-generated by `\eqmark` sequence.
 $$\label[my-eq]
   a^2 + b^2 = c^2  \eqmark
@@ -53,17 +53,17 @@ is on page~\pgref[my-pic].
 You can refer to \url{http://petr.olsak.net} using `\url`.
 Or use `\ulink` if the raw URL needs to be hidden:
 \ulink[http://petr.olsak.net/optex]{\OpTeX/ page}.
-The parameter text is colorized and it becomes 
+The parameter text is colorized and it becomes
 an active link if the `\hyperlinks` sequence
 is used at the beginning of the document.
 Internal links are activated too.
 
-\sec[tab-sec] Tables 
+\sec[tab-sec] Tables
 
-The `\table` sequence can be used 
+The `\table` sequence can be used
 instead of \"low level" `\halign`.
-The following table is framed by `\frame` sequence 
-in order to get a double frame.
+The following table is framed by the `\frame` sequence
+to get a double frame.
 
 \bigskip
 \caption/t [my-tab]  Testing table.
@@ -76,8 +76,8 @@ in order to get a double frame.
 
 \sec Images
 
-The images (PDF, JPG, PNG, TIFF) can be inserted 
-by `\inspic` sequence. The `\caption` 
+The images (PDF, JPG, PNG, TIFF) can be inserted
+by `\inspic` sequence. The `\caption`
 can be added if you need to refer to a figure.
 
 \label[my-pic]
@@ -95,7 +95,7 @@ by `\begtt` and `\endtt` sequences
 This is verbatim.
   All characters are printed $$, \, # etc.
 \endtt
-or it can be included by `\verbinput` from external file.
+or it can be included by `\verbinput` from an external file.
 
 \verbinput (98-100) op-demo.tex
 
@@ -106,7 +106,7 @@ The Math alphabets
 are provided. For example:
 $$
   {\bi A} = \pmatrix {\cal C  & \script C \cr
-                      \frak M & \bbchar R }.  
+                      \frak M & \bbchar R }.
 $$
 Hundreds of AMS symbols are available:
 $\sphericalangle, \boxplus, \Cup, \Cap, \ldots$
@@ -117,11 +117,11 @@ The `\fontfam` command selects a desired family of fonts.
 The `\typosize` or `\typoscale` sequences set the size
 and baselineskip of used fonts (including math fonts).
 The `\fnote` generates a footnote\fnote{Like this} and
-`\mnote` generates a margin note. 
+`\mnote` generates a margin note.
 The `\margins` sets margins and paper dimensions.
 The `\cite` sequence can be used for bibliographic citations.
-The `\bib` sequence creates one bibliography record. Or 
-you can use `\usebib` for direct access to the {\tt.bib} files. 
+The `\bib` sequence creates one bibliography record. Or
+you can use `\usebib` for direct access to the {\tt.bib} files.
 The list of features does not end here\dots
 
 \bye
diff --git a/macros/luatex/optex/demo/op-letter-cs.tex b/macros/luatex/optex/demo/op-letter-cs.tex
index 1b5d722d3b..b6883cb74c 100644
--- a/macros/luatex/optex/demo/op-letter-cs.tex
+++ b/macros/luatex/optex/demo/op-letter-cs.tex
@@ -1,4 +1,4 @@
-%% This is part of OpTeX project, see http://petr.olsak.net/optex
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
 
 \letter         % \letter OpTeX style activated
 \fontfam[bonum]
diff --git a/macros/luatex/optex/demo/op-letter-en.tex b/macros/luatex/optex/demo/op-letter-en.tex
index a7f19c43d4..0154e48c01 100644
--- a/macros/luatex/optex/demo/op-letter-en.tex
+++ b/macros/luatex/optex/demo/op-letter-en.tex
@@ -1,4 +1,4 @@
-%% This is part of OpTeX project, see http://petr.olsak.net/optex
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
 \useOpTeX
 
 \letter            % \letter OpTeX style activated
diff --git a/macros/luatex/optex/demo/op-slides.tex b/macros/luatex/optex/demo/op-slides.tex
index c46a337524..8c9bca24fc 100644
--- a/macros/luatex/optex/demo/op-slides.tex
+++ b/macros/luatex/optex/demo/op-slides.tex
@@ -1,4 +1,4 @@
-%% This is part of OpTeX project, see http://petr.olsak.net/optex
+%% This is part of the OpTeX project, see http://petr.olsak.net/optex
 
 \slides   % OpTeX slides style activated
 
@@ -27,7 +27,7 @@
 
 * The the simple document looks like:
 
-\begtt 
+\begtt
 \slides       % style initialized
 %\wideformat  % 16:9
 \slideshow    % partially uncovering ideas
@@ -41,12 +41,12 @@ text
 \pg.
 \endtt
 
-* If `\slideshow` is missing or commented out then 
-  \"partially uncovering ideas" (see later) are deactivated. It is useful 
+* If `\slideshow` is missing or commented out then
+  \"partially uncovering ideas" (see later) are deactivated. It is useful
   for printing.
 * The `\slideshow` must be the last command in the declaration part of the
   document.
-* By default, the slides have A5 landscape format. 
+* By default, the slides have A5 landscape format.
   You can declare `\wideformat`. Then the height is the same
   but width is 263\,mm, i.\,e.~the ratio width:height is 16:9.
 
@@ -58,31 +58,31 @@ text
   by `\tit Title` (terminated by end of line).
 * The `\subtit Author name etc.`\ (terminated by end of line)
   can be used after `\tit` at the first slide.
-* You can use `\nl` for new line in paragraphs or titles.
+* You can use `\nl` for a new line in paragraphs or titles.
 
 \sec Default design
 
 * The paragraph texts are ragged right.
-* Titles, subtitles and section titles are centered.
+* Titles, subtitles, and section titles are centered.
 * The `\sec` and `\secc` are printed without numbers.
 * No paragraph indentation, a little vertical space between paragraphs.
-* The Heros font family (aka Helvetica) is initialized as default.\nl 
+* The Heros font family (aka Helvetica) is initialized as default.\nl
   Sans-serif FiraMath font for math typesetting is used.\nl
   If `\fontfam[<famname>]` precedes `\slides` then it rewrites default.
-* The items in lists are started by blue square (`\type X` and `\type x` ).
+* The items in lists are started by a blue square (`\type X` and `\type x` ).
 
 \pg; %------------------------------------------------------------------
 
 \sec One slide (one page)
 
-* Top level item list is activated by default. The asterisk `*` opens 
-  new item at the top level list.
+* Top-level item list is activated by default. The asterisk `*` opens
+  new item at the top-level list.
 * Nested items lists (second and more level) should be created in
   the `\begitems`\dots`\enditems` environments.
 * Each slide (page) must be terminated by `\pg;` command.
 * The last slide must be terminated by `\pg.` command or by `\bye`.
 
-\begtt 
+\begtt
 \sec My ideas
 
 * First idea
@@ -94,7 +94,7 @@ text
 * Final idea
 \endtt
 
-* Note: each page is processed in a group, so: put your own definitions 
+* Note: each page is processed in a group, so: put your own definitions
   (if~exist) before `\slideshow` or use `\global` assignment.
 
 \pg; %------------------------------------------------------------------
@@ -106,14 +106,14 @@ text
 * the character `;` -- normal next page,\pg+
 * the character `.` -- the end of the document,\pg+
 * the character `+` -- next page keeps the same text
-  and a next text is added (usable for partially uncovering of ideas).\pg+ 
+  and a next text is added (usable for partially uncovering of ideas).\pg+
 \enditems
 
 * Summary:
 \begtt
 \pg;    ... next page
 \pg.    ... the end of the document
-\pg+    ... uncover next text at the same page
+\pg+    ... uncover next text on the same page
 \endtt
 \pg+
 
@@ -140,9 +140,9 @@ The previous page was created by:
 
 * Summary
 ...
-* When `\slideshow` is not declared 
+* When `\slideshow` is not declared
   then `\pg+` is deactivated.\pg+
-* The `\pg+` creates a new \"virtual page", 
+* The `\pg+` creates a new \"virtual page",
   so the current paragraph is terminated.
 \pg;
 \endtt
@@ -151,16 +151,16 @@ The previous page was created by:
 
 \sec Notes
 
-* When `\slideshow` is active then you cannot reference sections by 
+* When `\slideshow` is active then you cannot reference sections by
   hyperlinked `\ref`. Only `\pgref` works (and goes to the last layer
   of the referenced page).
 * If the text overfull the page (slide) then it follows to the next page without
-  saying explicitly `\pg;`. But `\slideshow` cannot work in such case.\pg+
+  saying explicitly `\pg;`. But `\slideshow` cannot work in this case.\pg+
 
 \sec More about design
 
-* You can use `\backgroundpic{<image-file>}` for putting an image to the backgroud.
-* You can re-declare `\footline` or re-define internal macros for design as 
+* You can use `\backgroundpic{<image-file>}` for putting an image to the background.
+* You can re-declare `\footline` or re-define internal macros for design as
   you wish.
 * You can put the images or text wherever using `\putimege` or `\puttext`
   macros...
@@ -182,14 +182,14 @@ The previous page was created by:
   prints red HELLO, as shown here.\pg+
 
 * `\putpic <right> <up> <width> <height> {<image-file>}`
-  puts the image with desired <width> and <height> at the position like 
+  puts the image with desired <width> and <height> at the position like
   `\puttext` puts the text.
 
   \putpic .8\hsize 20mm 30mm \nospec {op-ring.png}
-* The ring above is the result of 
+* The ring above is the result of
 
 \begtt
-\putpic .8\hsize 20mm 30mm \nospec {op-ring.png} 
+\putpic .8\hsize 20mm 30mm \nospec {op-ring.png}
 \endtt
   %
   used at beginning of this paragraph.\pg+
@@ -204,22 +204,22 @@ The previous page was created by:
   a~group.
 * The exception is the nested environment `\begitems...\enditems`.
 * The `\pg+` always finalizes the current paragraph.
-  It is impossible to hide only a part of horizontal mode.\pg+
+  It is impossible to hide only a part of the horizontal mode.\pg+
 
 \sec The \code{\\layers}\,...\code{\\endlayers} environment
 
-If you really need something unsupported by `\pg+` then you can use 
+If you really need something unsupported by `\pg+` then you can use
 
 \begtt \catcode`\<=13
 \layers <number>
 <layered text>
 \endlayers
-\endtt 
+\endtt
 
 * The <layered text> should include conditions like
-  `\ifnum\layernum...` or `\ifcase\layernum`. 
+  `\ifnum\layernum...` or `\ifcase\layernum`.
   It is printed <number> times to more slide pages (layers) with the same
-  surrounding text. See next page... 
+  surrounding text. See next page...
 
 \pg; %------------------------------------------------------------------
 
@@ -240,7 +240,7 @@ The transparent (invisible) text is used in other cases.
 
 The following dance:
 \layers 3
-{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.} 
+{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.}
 \endlayers
 \pg+
 
@@ -248,13 +248,13 @@ was generated by
 
 \begtt
 \layers 3
-{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.} 
+{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.}
 \endlayers
 \endtt
 
 \pg+
-* The <layered text> is treated as macro parameter. So, you cannot use verbatim
-  nor `\sec` titles here. Maximal one `\layers` environment can be per one 
+* The <layered text> is treated as a macro parameter. So, you cannot use verbatim
+  nor `\sec` titles here. Maximal one `\layers` environment can be per one
   page (terminated by `\pg+` or `\pg;` or `\pg.`
 
 \pg; %------------------------------------------------------------------
@@ -264,15 +264,15 @@ was generated by
 The \LaTeX{} package {\bf\Blue Beamer} gives much more features and many themes
 are prepared for Beamer, {\bf\Red but}
 \pg+
-* the user of Beamer is forced to {\em program} his/her document using 
+* the user of Beamer is forced to {\em program} his/her document using
   dozens of \code{\\begin{foo}} and \code{\\end{foo}} and many another
   programming constructions,\pg+
-* plain \TeX{} gives you a possibility to simply 
+* plain \TeX{} gives you a possibility to simply
   {\em write} your document with minimal markup. The result is more compact.
-  You can concentrate to the contents of your document, not to the
+  You can concentrate on the contents of your document, not on the
   programming syntax.\pg+
 * User needs to read 250 pages of doc for understanding Beamer,\pg+
-* on the other hand, you need to read only ten 
+* on the other hand, you need to read only ten
   slides\fnote{this eleventh slide isn't counted}
   and you are ready to use {\bf\Blue\OpTeX/ slides}.