diff --git a/environments/mkessler-fancythm.sty b/environments/mkessler-fancythm.sty
index 8ad4b84..0b691b4 100644
--- a/environments/mkessler-fancythm.sty
+++ b/environments/mkessler-fancythm.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-fancythm}[2021/10/16 - Theorem-Environment Package]
+\ProvidesPackage{mkessler-fancythm}[2021/10/17 - Theorem-Environment Package]
 
 
 %Provides fancy theorem-like-environments used in the write-ups of my lecture notes
diff --git a/environments/mkessler-thmstyle.sty b/environments/mkessler-thmstyle.sty
index 2175493..9111d63 100644
--- a/environments/mkessler-thmstyle.sty
+++ b/environments/mkessler-thmstyle.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-thmstyle}[2021/10/16 - Mdframed Styles used for fancythm package]
+\ProvidesPackage{mkessler-thmstyle}[2021/10/17 - Mdframed Styles used for fancythm package]
 
 
 %%%%% This provides easy-to-use styles, especially for use with the 
diff --git a/exercises/mkessler-sheet.cls b/exercises/mkessler-sheet.cls
index a0d4327..99479af 100644
--- a/exercises/mkessler-sheet.cls
+++ b/exercises/mkessler-sheet.cls
@@ -34,13 +34,13 @@
 % edit the source file and build the class again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{mkessler-sheet}[2021/10/16 - Write up university exercise sheets]
+\ProvidesClass{mkessler-sheet}[2021/10/17 - Write up university exercise sheets]
 
 
 
diff --git a/lecture-notes/mkessler-lectures.sty b/lecture-notes/mkessler-lectures.sty
index 7b81f64..d02723b 100644
--- a/lecture-notes/mkessler-lectures.sty
+++ b/lecture-notes/mkessler-lectures.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-lectures}[2021/10/16 - Package for managing different lectures within a document]
+\ProvidesPackage{mkessler-lectures}[2021/10/17 - Package for managing different lectures within a document]
 
 
 % The core of the lecture command this package provides has been taken from the preamble in
diff --git a/lecture-notes/mkessler-script.cls b/lecture-notes/mkessler-script.cls
index d9460c9..0fc70bb 100644
--- a/lecture-notes/mkessler-script.cls
+++ b/lecture-notes/mkessler-script.cls
@@ -34,13 +34,13 @@
 % edit the source file and build the class again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{mkessler-script}[2021/10/16 - Write up lecture notes as script]
+\ProvidesClass{mkessler-script}[2021/10/17 - Write up lecture notes as script]
 
 
 
diff --git a/math/mkessler-faktor.sty b/math/mkessler-faktor.sty
index ba9f93b..34e6006 100644
--- a/math/mkessler-faktor.sty
+++ b/math/mkessler-faktor.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-faktor}[2021/10/16 - Faktor package that also handles cofaktors]
+\ProvidesPackage{mkessler-faktor}[2021/10/17 - Faktor package that also handles cofaktors]
 
 
 
diff --git a/math/mkessler-math.sty b/math/mkessler-math.sty
index 58d6d81..b35c06e 100644
--- a/math/mkessler-math.sty
+++ b/math/mkessler-math.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-math}[2021/10/16 - Main math package.]
+\ProvidesPackage{mkessler-math}[2021/10/17 - Main math package.]
 
 
 % Collects the basic math packages used for my lecture-note write-ups
diff --git a/math/mkessler-mathalias.sty b/math/mkessler-mathalias.sty
index f923de2..3a23413 100644
--- a/math/mkessler-mathalias.sty
+++ b/math/mkessler-mathalias.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathalias}[2021/10/16 - Easy aliasing for math style commands]
+\ProvidesPackage{mkessler-mathalias}[2021/10/17 - Easy aliasing for math style commands]
 
 
 
diff --git a/math/mkessler-mathfig.sty b/math/mkessler-mathfig.sty
index c3c81a2..0ce5b73 100644
--- a/math/mkessler-mathfig.sty
+++ b/math/mkessler-mathfig.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathfig}[2021/10/16 - Math figures with TikZ / pgfplots / xy]
+\ProvidesPackage{mkessler-mathfig}[2021/10/17 - Math figures with TikZ / pgfplots / xy]
 
 
 % This is just a collection of the packages I use to typeset mathematical figures
diff --git a/math/mkessler-mathfixes.sty b/math/mkessler-mathfixes.sty
index 6d11930..c0ec38d 100644
--- a/math/mkessler-mathfixes.sty
+++ b/math/mkessler-mathfixes.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathfixes}[2021/10/16 - Hacky math packages for some (custom) fixes]
+\ProvidesPackage{mkessler-mathfixes}[2021/10/17 - Hacky math packages for some (custom) fixes]
 
 
 % This just brings together some (possibly ugly) hacks that I use when writing math. Likely, you do not want to use this except when building around this package (like I did), or already have similar shortcuts
diff --git a/math/mkessler-mathfont.sty b/math/mkessler-mathfont.sty
index 208248d..fcbc8fd 100644
--- a/math/mkessler-mathfont.sty
+++ b/math/mkessler-mathfont.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathfont}[2021/10/16 - Collects several math fonts together]
+\ProvidesPackage{mkessler-mathfont}[2021/10/17 - Collects several math fonts together]
 
 
 %%% Store away the several (partially conflicting) fonts in internal macros
diff --git a/math/mkessler-mathop.sty b/math/mkessler-mathop.sty
index 0757503..0c53459 100644
--- a/math/mkessler-mathop.sty
+++ b/math/mkessler-mathop.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathop}[2021/10/16 - Math Operator Package]
+\ProvidesPackage{mkessler-mathop}[2021/10/17 - Math Operator Package]
 
 
 %Provides some commonly used Operators used in the write-ups of my lecture notes
@@ -128,6 +128,7 @@
 \DeclareSimpleMathOperator{rank}
 \DeclareSimpleMathOperator{Mat}
 \DeclareSimpleMathOperator{ev}
+\DeclareSimpleMathOperator{tr}
 
 %Algebra
 \DeclareSimpleMathOperator{Quot}
diff --git a/math/mkessler-mathsymb.sty b/math/mkessler-mathsymb.sty
index fac2c06..a54d8c1 100644
--- a/math/mkessler-mathsymb.sty
+++ b/math/mkessler-mathsymb.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-mathsymb}[2021/10/16 - Some extra math-related symbols.]
+\ProvidesPackage{mkessler-mathsymb}[2021/10/17 - Some extra math-related symbols.]
 
 
 % A collection of math-related symbols / tools I often use, mainly collected together from Stack Overflow or hacked together myself
diff --git a/math/mkessler-unicodechar.sty b/math/mkessler-unicodechar.sty
index 7258d53..27ff48a 100644
--- a/math/mkessler-unicodechar.sty
+++ b/math/mkessler-unicodechar.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-unicodechar}[2021/10/16 - Wrapper for the newunicodechare package with some defined unicode symbols.]
+\ProvidesPackage{mkessler-unicodechar}[2021/10/17 - Wrapper for the newunicodechare package with some defined unicode symbols.]
 
 
 % This is just a simple package loading the newunicodechar package and defining the common unicode symbols i regularly use for typesetting mathematics
diff --git a/misc/mkessler-hypersetup.sty b/misc/mkessler-hypersetup.sty
index c9de200..9ee1c86 100644
--- a/misc/mkessler-hypersetup.sty
+++ b/misc/mkessler-hypersetup.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-hypersetup}[2021/10/16 - Package for setting up hyperref, cleveref and some default hyperref colors]
+\ProvidesPackage{mkessler-hypersetup}[2021/10/17 - Package for setting up hyperref, cleveref and some default hyperref colors]
 
 
 
diff --git a/misc/mkessler-incfig.sty b/misc/mkessler-incfig.sty
index 33d597c..2160b18 100644
--- a/misc/mkessler-incfig.sty
+++ b/misc/mkessler-incfig.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-incfig}[2021/10/16 - Figure support for inkscape figures by Gilles Castell]
+\ProvidesPackage{mkessler-incfig}[2021/10/17 - Figure support for inkscape figures by Gilles Castell]
 
 
 
diff --git a/misc/mkessler-vocab.sty b/misc/mkessler-vocab.sty
index 3eef06f..0537651 100644
--- a/misc/mkessler-vocab.sty
+++ b/misc/mkessler-vocab.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-vocab}[2021/10/16 - Package for emphasizing vocabulary]
+\ProvidesPackage{mkessler-vocab}[2021/10/17 - Package for emphasizing vocabulary]
 
 
 %%Provides a \vocab<[name in index]>{vocabulary} command to print vocabulary in bold blue and automatically index it.
diff --git a/utils/mkessler-counters.sty b/utils/mkessler-counters.sty
index ee425cf..41a9859 100644
--- a/utils/mkessler-counters.sty
+++ b/utils/mkessler-counters.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-counters}[2021/10/16 - Write LaTeX counters to auxiliary file]
+\ProvidesPackage{mkessler-counters}[2021/10/17 - Write LaTeX counters to auxiliary file]
 
 
 
diff --git a/utils/mkessler-findpackage.sty b/utils/mkessler-findpackage.sty
index e0f807b..491daa4 100644
--- a/utils/mkessler-findpackage.sty
+++ b/utils/mkessler-findpackage.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-findpackage}[2021/10/16 - Find a package that provides some command]
+\ProvidesPackage{mkessler-findpackage}[2021/10/17 - Find a package that provides some command]
 
 
 % This is just a quick packaging of the post by
diff --git a/wip/mkessler-bibliography.sty b/wip/mkessler-bibliography.sty
index 79516a2..1a07945 100644
--- a/wip/mkessler-bibliography.sty
+++ b/wip/mkessler-bibliography.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-bibliography}[2021/10/16 - Package to easily print bibliography and image attributions in document]
+\ProvidesPackage{mkessler-bibliography}[2021/10/17 - Package to easily print bibliography and image attributions in document]
 
 
 \RequirePackage{xkeyval}
diff --git a/wip/mkessler-enumerate.sty b/wip/mkessler-enumerate.sty
index 31e0e15..51e5fbc 100644
--- a/wip/mkessler-enumerate.sty
+++ b/wip/mkessler-enumerate.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-enumerate}[2021/10/16 - Simple enumeration package wrapper. Handles custom number setting and beamer class.]
+\ProvidesPackage{mkessler-enumerate}[2021/10/17 - Simple enumeration package wrapper. Handles custom number setting and beamer class.]
 
 
 
diff --git a/wip/mkessler-exsheet.sty b/wip/mkessler-exsheet.sty
index 3c19e33..daaf39e 100644
--- a/wip/mkessler-exsheet.sty
+++ b/wip/mkessler-exsheet.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-exsheet}[2021/10/16 - Include exercise sheets into lecture notes easily.]
+\ProvidesPackage{mkessler-exsheet}[2021/10/17 - Include exercise sheets into lecture notes easily.]
 
 
 
diff --git a/wip/mkessler-figures.sty b/wip/mkessler-figures.sty
index 696e976..0d57c4d 100644
--- a/wip/mkessler-figures.sty
+++ b/wip/mkessler-figures.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-figures}[2021/10/16 - Packages related to inclusion of figures.]
+\ProvidesPackage{mkessler-figures}[2021/10/17 - Packages related to inclusion of figures.]
 
 
 
diff --git a/wip/mkessler-gag.sty b/wip/mkessler-gag.sty
index 6d394dd..7fc7b1e 100644
--- a/wip/mkessler-gag.sty
+++ b/wip/mkessler-gag.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-gag}[2021/10/16 - Numbering of environments with a fractional environment number]
+\ProvidesPackage{mkessler-gag}[2021/10/17 - Numbering of environments with a fractional environment number]
 
 
 % For the stack exchange source, see
diff --git a/wip/mkessler-lang-input.sty b/wip/mkessler-lang-input.sty
index 8d74c60..38986df 100644
--- a/wip/mkessler-lang-input.sty
+++ b/wip/mkessler-lang-input.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-lang-input}[2021/10/16 - Packages related to language input. Still work in progress, not intended for use.]
+\ProvidesPackage{mkessler-lang-input}[2021/10/17 - Packages related to language input. Still work in progress, not intended for use.]
 
 
 \RequirePackage[\ifutf utf8\else utf8x\fi]{inputenc}
diff --git a/wip/mkessler-proof.sty b/wip/mkessler-proof.sty
index 4754cf9..25e51f0 100644
--- a/wip/mkessler-proof.sty
+++ b/wip/mkessler-proof.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-proof}[2021/10/16 - Automatic references to theorems in proofs. Claim counters within proofs]
+\ProvidesPackage{mkessler-proof}[2021/10/17 - Automatic references to theorems in proofs. Claim counters within proofs]
 
 
 
diff --git a/wip/mkessler-removed.sty b/wip/mkessler-removed.sty
index 49e9412..6fb6989 100644
--- a/wip/mkessler-removed.sty
+++ b/wip/mkessler-removed.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-removed}[2021/10/16 - (For now]
+\ProvidesPackage{mkessler-removed}[2021/10/17 - (For now]
 
  removed parts of other packages. Not intended for use right now.)% Quotations
 \RequirePackage{csquotes} % quotations
diff --git a/wip/mkessler-restate.sty b/wip/mkessler-restate.sty
index 2b9dc2b..9faa6ef 100644
--- a/wip/mkessler-restate.sty
+++ b/wip/mkessler-restate.sty
@@ -34,13 +34,13 @@
 % edit the source file and build the package again.
 % 
 % Build details:
-%   Build time: 2021/10/16 07:03
+%   Build time: 2021/10/17 14:13
 %   PyTeX version: v1.0.0-3 (commit 4409c94)
-%   LatexPackages version: v2.2.0-7 (commit fbd489a)
+%   LatexPackages version: v2.2.1 (commit db62b98)
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{mkessler-restate}[2021/10/16 - Replacement package]
+\ProvidesPackage{mkessler-restate}[2021/10/17 - Replacement package]
 
 
 \RequirePackage{xkeyval}