fix double fullstop and add support for more relation symbols in salign

ana8.tex

@@ -15,7 +15,7 @@
 
 \begin{proof}
     Sei $x \in \mathbb{K}^{n}$. Dann ist
-    \begin{salign}
+    \begin{salign*}
         \Vert (\mathbb{I} + B) x \Vert 
         &=  \Vert x + B x\Vert \\
         &\stackrel{\text{Dreiecksungl.}}{\ge }  \Vert x \Vert - \Vert Bx \Vert \\
@@ -33,7 +33,7 @@
         - \Vert B (\mathbb{I} + B)^{-1} \Vert \\
         &\ge  \Vert (\mathbb{I} + B)^{-1} \Vert - \Vert B \Vert \cdot \Vert (\mathbb{I} + B)^{-1} \Vert \\
         &=  (1 - \Vert B \Vert) \Vert (\mathbb{I} + B)^{-1} \Vert
-    .\end{salign}
+    .\end{salign*}
     Damit folgt die Behauptung.
 \end{proof}
 

lecture.cls

@@ -162,10 +162,17 @@
 % uses regular expressions to calculate the widest stackrel
 % to put additional padding on both sides of relation symbols
 \NewEnviron{salign}
+{
+    \begin{align}
+        \lec_insert_padding:V \BODY
+    \end{align}
+}
+% starred version that does no equation numbering
+\NewEnviron{salign*}
 {
     \begin{align*}
         \lec_insert_padding:V \BODY
-    .\end{align*}
+    \end{align*}
 }
 
 % some helper variables
@@ -210,7 +217,7 @@
   }
   % replace all relations with align characters (&) and add the needed padding
   \regex_replace_all:nnN
-      { (&=|&\c{le}|&\c{ge}|&\c{stackrel}{.*?}{.*?}|&\c{neq}) }
+      { (\c{approx}&|&\c{approx}|\c{equiv}&|&\c{equiv}|=&|&=|\c{le}&|&\c{le}|\c{ge}&|&\c{ge}|&\c{stackrel}{.*?}{.*?}|\c{stackrel}{.*?}{.*?}&|&\c{neq}|\c{neq}&) }
       { \c{kern} \u{l_tmp_dim_needed} \1 \c{kern} \u{l_tmp_dim_needed} }
       \l__lec_text_tl
   \l__lec_text_tl