diff --git a/HsH-classes.dtx b/HsH-classes.dtx
index 869c4072851a21a685c122d0c5cac26cbb04639f..8017e89e520e85a43084cb3ab2efc0a0a10bfb0e 100644
--- a/HsH-classes.dtx
+++ b/HsH-classes.dtx
@@ -190,7 +190,6 @@
 %% typesetting indexes upright or standart
 \def\subinrm#1{\sb{\mathrm{#1}}}
 {\catcode`\_=13 \global\let_=\subinrm}
-\mathcode`_="8000
 % the toggle for upright subscripts
 \newcommand\upsubscripts{\catcode`\_=12 }
 % the toggle for italic subscripts
diff --git a/src/HsH-article.cls b/src/HsH-article.cls
index 6c709cbfea2c72b1204bf853542a6c9af3a92075..5240a5b982d6b3b81177a27bc0a3cf6fd0544739 100644
--- a/src/HsH-article.cls
+++ b/src/HsH-article.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `article')
-%%
+%% 
 %% This is a generated file.
-%%
+%% 
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%%
+%% 
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%%
+%% 
 %%    http://www.latex-project.org/lppl.txt
-%%
+%% 
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%%
+%% 
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2022-03-28> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-article}
@@ -140,7 +140,6 @@
 %% typesetting indexes upright or standart
 \def\subinrm#1{\sb{\mathrm{#1}}}
 {\catcode`\_=13 \global\let_=\subinrm}
-\mathcode`_="8000
 \newcommand\upsubscripts{\catcode`\_=12 }
 \newcommand\normalsubscripts{\catcode`\_=8 }
 \upsubscripts
@@ -153,14 +152,22 @@
       \ifx\@shorttitle\@empty\@title\else\@shorttitle\fi
     }%
   }
-  {\parbox[b]{\sls@headwidth}{\LaTeXraggedleft\leftmark}}
+  {
+    \parbox[b]{\sls@headwidth}{
+      \LaTeXraggedleft
+      \leftmark
+    }%
+  }
   {
     \parbox[b]{.45\sls@headwidth}{
       \LaTeXraggedright
       \ifx\@shorttitle\@empty\@title\else\@shorttitle\fi
     }%
     \hfill
-    \parbox[b]{.45\sls@headwidth}{\LaTeXraggedleft\headmark}%
+    \parbox[b]{.45\sls@headwidth}{
+      \LaTeXraggedleft
+      \headmark
+    }%
   }
   (\textwidth,.1pt)
 }{
diff --git a/src/HsH-report.cls b/src/HsH-report.cls
index 137883733e05d279248c2e61841674501685b426..111a7aef35a0293249eae7b02ce513cd43c9c561 100644
--- a/src/HsH-report.cls
+++ b/src/HsH-report.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `report')
-%%
+%% 
 %% This is a generated file.
-%%
+%% 
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%%
+%% 
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%%
+%% 
 %%    http://www.latex-project.org/lppl.txt
-%%
+%% 
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%%
+%% 
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2022-03-28> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-report}
@@ -140,7 +140,6 @@
 %% typesetting indexes upright or standart
 \def\subinrm#1{\sb{\mathrm{#1}}}
 {\catcode`\_=13 \global\let_=\subinrm}
-\mathcode`_="8000
 \newcommand\upsubscripts{\catcode`\_=12 }
 \newcommand\normalsubscripts{\catcode`\_=8 }
 \upsubscripts
@@ -153,14 +152,22 @@
       \ifx\@shorttitle\@empty\@title\else\@shorttitle\fi
     }%
   }
-  {\parbox[b]{\sls@headwidth}{\LaTeXraggedleft\leftmark}}
+  {
+    \parbox[b]{\sls@headwidth}{
+      \LaTeXraggedleft
+      \leftmark
+    }%
+  }
   {
     \parbox[b]{.45\sls@headwidth}{
       \LaTeXraggedright
       \ifx\@shorttitle\@empty\@title\else\@shorttitle\fi
     }%
     \hfill
-    \parbox[b]{.45\sls@headwidth}{\LaTeXraggedleft\headmark}%
+    \parbox[b]{.45\sls@headwidth}{
+      \LaTeXraggedleft
+      \headmark
+    }%
   }
   (\textwidth,.1pt)
 }{
diff --git a/src/HsH-standalone.cls b/src/HsH-standalone.cls
index 3ff2d255847a432addd6f9aab6b38c9aba68d60e..1bdde11ad66ca79e99d082ea439c0ea1cb5356fb 100644
--- a/src/HsH-standalone.cls
+++ b/src/HsH-standalone.cls
@@ -5,21 +5,21 @@
 %% The original source files were:
 %%
 %% HsH-classes.dtx  (with options: `standalone')
-%%
+%% 
 %% This is a generated file.
-%%
+%% 
 %% Copyright (C) 2021 by Jan Wille <mail@janwille.de>
-%%
+%% 
 %% This file may be distributed and/or modified under the conditions of
 %% the LaTeX Project Public License, either version 1.3 of this license
 %% or (at your option) any later version.  The latest version of this
 %% license is in:
-%%
+%% 
 %%    http://www.latex-project.org/lppl.txt
-%%
+%% 
 %% and version 1.3 or later is part of all distributions of LaTeX version
 %% 2021/01/01 or later.
-%%
+%% 
 \typeout{Adapted from KOMA script for use in Hochschule Hannover <2022-03-28> Jan Wille}
 \NeedsTeXFormat{LaTeX2e}
 \newcommand{\myClassName}{HsH-standalone}
@@ -84,7 +84,6 @@
 %% typesetting indexes upright or standart
 \def\subinrm#1{\sb{\mathrm{#1}}}
 {\catcode`\_=13 \global\let_=\subinrm}
-\mathcode`_="8000
 \newcommand\upsubscripts{\catcode`\_=12 }
 \newcommand\normalsubscripts{\catcode`\_=8 }
 \upsubscripts