Patch #1679379: add documentation for fnmatch.translate().

 (backport from rev. 54323)

Doc/lib/libfnmatch.tex

@@ -36,6 +36,19 @@ lower- or upper-case before the comparison is performed.  If you
 require a case-sensitive comparison regardless of whether that's
 standard for your operating system, use \function{fnmatchcase()}
 instead.
+
+This example will print all file names in the current directory with the
+extension \code{.txt}:
+
+\begin{verbatim}
+import fnmatch
+import os
+
+for file in os.listdir('.'):
+    if fnmatch.fnmatch(file, '*.txt'):
+        print file
+\end{verbatim}
+
 \end{funcdesc}
 
 \begin{funcdesc}{fnmatchcase}{filename, pattern}
@@ -50,6 +63,24 @@ implemented more efficiently.
 \versionadded{2.2}
 \end{funcdesc}
 
+\begin{funcdesc}{translate}{pattern}
+Return the shell-style \var{pattern} converted to a regular
+expression.
+
+Example:
+
+\begin{verbatim}
+>>> import fnmatch, re
+>>>
+>>> regex = fnmatch.translate('*.txt')
+>>> regex
+'.*\\.txt$'
+>>> reobj = re.compile(regex)
+>>> print reobj.match('foobar.txt')
+<_sre.SRE_Match object at 0x...>
+\end{verbatim}
+\end{funcdesc}
+
 \begin{seealso}
   \seemodule{glob}{\UNIX{} shell-style path expansion.}
 \end{seealso}

Misc/NEWS

@@ -503,6 +503,8 @@ Tests
 Documentation
 -------------
 
+- Patch #1679379: add documentation for fnmatch.translate().
+
 - Patch #1671450: add a section about subclassing builtin types to the
   "extending and embedding" tutorial.