Change the way \textasciitilde is implemented so it works more consistently

(dropping tildes into data that still goes through LaTeX-like processing is
a bad idea).

Doc/perl/python.perl

@@ -85,7 +85,7 @@ sub do_cmd_let{
 
 # the older version of LaTeX2HTML we use doesn't support this, but we use it:
 
-sub do_cmd_textasciitilde{ '~' . @_[0]; }
+sub do_cmd_textasciitilde{ '~' . @_[0]; }
 sub do_cmd_textasciicircum{ '^' . @_[0]; }
 sub do_cmd_textbar{ '|' . @_[0]; }
 sub do_cmd_textgreater{ '>' . @_[0]; }