cmdutil: fall back to filename if glob expand has errors

On Windows, Mercurial tries to glob expand provided filenames as a
convenience to the user. Unfortunately, there are valid filenames
which are not valid glob patterns.  In those cases, we should fallback
to the original provided filename.

mercurial/cmdutil.py

@@ -242,7 +242,10 b' def expandpats(pats):'
     for p in pats:
         kind, name = _match._patsplit(p, None)
         if kind is None:
-            globbed = glob.glob(name)
+            try:
+                globbed = glob.glob(name)
+            except re.error:
+                globbed = [name]
             if globbed:
                 ret.extend(globbed)
                 continue