logcmdutil: also check for copies in null revision and working copy

It's safe (and fast) to look for copies in the null revision, and it's
incorrect not to look for them in the working copy, so let's look in
both places.

Differential Revision: https://phab.mercurial-scm.org/D6544

mercurial/logcmdutil.py

@@ -891,7 +891,7 b' def displaygraph(ui, repo, dag, displaye'
     for rev, type, ctx, parents in dag:
         char = formatnode(repo, ctx)
         copies = None
-        if getrenamed and ctx.rev():
+        if getrenamed:
             copies = []
             for fn in ctx.files():
                 rename = getrenamed(fn, ctx.rev())
@@ -919,7 +919,7 b' def displayrevs(ui, repo, revs, displaye'
     for rev in revs:
         ctx = repo[rev]
         copies = None
-        if getrenamed is not None and rev:
+        if getrenamed is not None:
             copies = []
             for fn in ctx.files():
                 rename = getrenamed(fn, rev)

tests/test-status.t

@@ -630,7 +630,6 b' using log status template (issue5155)'
     b
   R b
   
-BROKEN: as above, 'a' should be marked a copy
   $ hg log -GTstatus -r 'wdir()' -C
   o  changeset:   2147483647:ffffffffffff
   |  parent:      0:8c55c58b4c0e
@@ -638,6 +637,7 b" BROKEN: as above, 'a' should be marked a"
      date:        * (glob)
      files:
      M a
+       b
      R b