Use \url{} to mark a URL.

Doc/lib/libregex.tex

@@ -15,7 +15,7 @@ converted.  The standard library module
 \code{reconvert}\refstmodindex{reconvert} helps in converting
 \code{regex} style regular expressions to \code{re}\refstmodindex{re}
 style regular expressions.  (For more conversion help, see the URL
-\file{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
+\url{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
 
 By default the patterns are Emacs-style regular expressions
 (with one exception).  There is

Doc/lib/libregsub.tex

@@ -10,13 +10,13 @@ Warning: these functions are not thread-safe.
 \strong{Obsolescence note:}
 This module is obsolete as of Python version 1.5; it is still being
 maintained because much existing code still uses it.  All new code in
-need of regular expressions should use the new \code{re} module, which
+need of regular expressions should use the new \module{re} module, which
 supports the more powerful and regular Perl-style regular expressions.
 Existing code should be converted.  The standard library module
-\code{reconvert} helps in converting \code{regex} style regular
-expressions to \code{re} style regular expressions.  (For more
+\module{reconvert} helps in converting \code{regex} style regular
+expressions to \module{re} style regular expressions.  (For more
 conversion help, see the URL
-\file{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
+\url{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
 
 \renewcommand{\indexsubitem}{(in module regsub)}
 

Doc/libregex.tex

@@ -15,7 +15,7 @@ converted.  The standard library module
 \code{reconvert}\refstmodindex{reconvert} helps in converting
 \code{regex} style regular expressions to \code{re}\refstmodindex{re}
 style regular expressions.  (For more conversion help, see the URL
-\file{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
+\url{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
 
 By default the patterns are Emacs-style regular expressions
 (with one exception).  There is

Doc/libregsub.tex

@@ -10,13 +10,13 @@ Warning: these functions are not thread-safe.
 \strong{Obsolescence note:}
 This module is obsolete as of Python version 1.5; it is still being
 maintained because much existing code still uses it.  All new code in
-need of regular expressions should use the new \code{re} module, which
+need of regular expressions should use the new \module{re} module, which
 supports the more powerful and regular Perl-style regular expressions.
 Existing code should be converted.  The standard library module
-\code{reconvert} helps in converting \code{regex} style regular
-expressions to \code{re} style regular expressions.  (For more
+\module{reconvert} helps in converting \code{regex} style regular
+expressions to \module{re} style regular expressions.  (For more
 conversion help, see the URL
-\file{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
+\url{http://starship.skyport.net/crew/amk/regex/regex-to-re.html}.)
 
 \renewcommand{\indexsubitem}{(in module regsub)}