Fix a bunch of typos in documentation, docstrings and comments.

(From SF patch #810751)

Doc/lib/libregex.tex

@@ -247,7 +247,7 @@ expressions.)
   \code{match()} and \code{search()}.  (Already compiled expression
   objects are not affected.)  The argument is an integer which is the
   OR of several flag bits.  The return value is the previous value of
-  the syntax flags.  Names for the flags are defined in the standard 
+  the syntax flags.  Names for the flags are defined in the standard
   module \code{regex_syntax}\refstmodindex{regex_syntax}; read the
   file \file{regex_syntax.py} for more information.
 \end{funcdesc}