context: make workingctx.matches() filter our removed files (API)

It seems surprising that workingctx.matches() includes files that had
been removed in the working copy. The callers don't want that either
(besides the `hg locate` that was changed in the previous patch).

The only observable difference that I'm aware of is that `hg log -T
'wdir()' -r '{files(...)}'` will no longer include removed files (an
improvement, IMO). That matches `hg files` (but does not match the
deprecated `hg locate`).

Differential Revision: https://phab.mercurial-scm.org/D3711

mercurial/context.py

@@ -1227,7 +1227,8 b' class committablectx(basectx):'
                                                unknown=True, ignored=False))
 
     def matches(self, match):
-        return sorted(self._repo.dirstate.matches(match))
+        ds = self._repo.dirstate
+        return sorted(f for f in ds.matches(match) if ds[f] != 'r')
 
     def ancestors(self):
         for p in self._parents:

tests/test-command-template.t

@@ -4344,6 +4344,12 b' Test files function'
   
   0
   
+  $ hg rm a
+  $ hg log -r "wdir()" -T "{rev}\n{join(files('*'), '\n')}\n"
+  2147483647
+  aa
+  b
+  $ hg revert a
 
 Test relpath function