Document new default arg to groups() and new functions/methods
groupdict() and findall().
diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index a1bcf06..849fa28 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -402,6 +402,13 @@
the old \function{regsub.split()} and \function{regsub.splitx()}.
\end{funcdesc}
+\begin{funcdesc}{findall}{pattern, string}
+Return a list of all non-overlapping matches of \var{pattern} in
+\var{string}. If one or more groups are present in the pattern,
+return a list of groups; this will be a list of tuples if the pattern
+has more than one group. Empty matches are included in the result.
+\end{funcdesc}
+
\begin{funcdesc}{sub}{pattern, repl, string\optional{, count\code{ = 0}}}
Return the string obtained by replacing the leftmost non-overlapping
occurrences of \var{pattern} in \var{string} by the replacement
@@ -504,6 +511,10 @@
Identical to the \function{split()} function, using the compiled pattern.
\end{methoddesc}
+\begin{methoddesc}[RegexObject]{findall}{string}
+Identical to the \function{findall()} function, using the compiled pattern.
+\end{methoddesc}
+
\begin{methoddesc}[RegexObject]{sub}{repl, string\optional{, count\code{ = 0}}}
Identical to the \function{sub()} function, using the compiled pattern.
\end{methoddesc}
@@ -566,13 +577,21 @@
\code{m.group('int')}, and \code{m.group(2)} is \code{'14'}.
\end{methoddesc}
-\begin{methoddesc}[MatchObject]{groups}{}
+\begin{methoddesc}[MatchObject]{groups}{\optional{default}}
Return a tuple containing all the subgroups of the match, from 1 up to
-however many groups are in the pattern. Groups that did not
-participate in the match have values of \code{None}. (Incompatibility
-note: in the original Python 1.5 release, if the tuple was one element
-long, a string would be returned instead. In later versions, a
-singleton tuple is returned in such cases.)
+however many groups are in the pattern. The \var{default} argument is
+used for groups that did not participate in the match; it defaults to
+\code{None}. (Incompatibility note: in the original Python 1.5
+release, if the tuple was one element long, a string would be returned
+instead. In later versions (from 1.5.1 on), a singleton tuple is
+returned in such cases.)
+\end{methoddesc}
+
+\begin{methoddesc}[MatchObject]{groupdict}{\optional{default}}
+Return a dictionary containing all the \emph{named} subgroups of the
+match, keyed by the subgroup name. The \var{default} argument is
+used for groups that did not participate in the match; it defaults to
+\code{None}.
\end{methoddesc}
\begin{methoddesc}[MatchObject]{start}{\optional{group}}