[PATCH 1 of 5] checkwinfilename: use %r in format string

[Adrian Buehlmann]

# HG changeset patch
# User Adrian Buehlmann <adrian at cadifra.com>
# Date 1302876923 -7200
# Node ID fb38be10ed99f8499b7fff0c1cbb5f5a505deedf
# Parent  924f40b977ee72ef7a3c1dce38b6aaa8c24198cd
checkwinfilename: use %r in format string

and adding doctests for \n and \r

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -511,8 +511,12 @@
     "filename contains 'AUX', which is reserved on Windows"
     >>> checkwinfilename("foo/bar/bla:.txt")
     "filename contains ':', which is reserved on Windows"
-    >>> checkwinfilename("foo/bar/b\07la.txt")
-    "filename contains '\\x07', which is invalid on Windows"
+    >>> checkwinfilename("foo/bar/jj\\07jj.txt")
+    "filename contains '\\\\x07', which is invalid on Windows"
+    >>> checkwinfilename("foo/bar/jj\\njj.txt")
+    "filename contains '\\\\n', which is invalid on Windows"
+    >>> checkwinfilename("foo/bar/jj\\rjj.txt")
+    "filename contains '\\\\r', which is invalid on Windows"
     >>> checkwinfilename("foo/bar/bla ")
     "filename ends with ' ', which is not allowed on Windows"
     '''
@@ -524,7 +528,7 @@
                 return _("filename contains '%s', which is reserved "
                          "on Windows") % c
             if ord(c) <= 31:
-                return _("filename contains '%s', which is invalid "
+                return _("filename contains %r, which is invalid "
                          "on Windows") % c
         base = n.split('.')[0]
         if base and base.lower() in _windows_reserved_filenames: