addremove: add labels for messages about added and removed files

This is the first step to add color for add and remove output.

mercurial/scmutil.py

@@ -1005,9 +1005,11 b' def addremove(repo, matcher, prefix, opt'
         if repo.ui.verbose or not m.exact(abs):
             if abs in unknownset:
                 status = _('adding %s\n') % m.uipath(abs)
+                label = 'addremove.added'
             else:
                 status = _('removing %s\n') % m.uipath(abs)
-            repo.ui.status(status)
+                label = 'addremove.removed'
+            repo.ui.status(status, label=label)
 
     renames = _findrenames(repo, m, added + unknown, removed + deleted,
                            similarity)

tests/test-addremove.t

@@ -69,6 +69,12 b''
   removing c
   adding d
   recording removal of a as rename to b (100% similar)
+  $ hg addremove -ns 50 --color debug
+  [addremove.removed ui.status|removing a]
+  [addremove.added ui.status|adding b]
+  [addremove.removed ui.status|removing c]
+  [addremove.added ui.status|adding d]
+  [ ui.status|recording removal of a as rename to b (100% similar)]
   $ hg addremove -s 50
   removing a
   adding b