update: warn about other topological head in pull and unbundle

Other commands have a '--update' triggering a bare update. We now issue the
message introduced into the previous changeset for these too.

mercurial/commands.py

@@ -5542,13 +5542,17 def postincoming(ui, repo, modheads, opt
     if modheads == 0:
         return
     if optupdate:
+        warndest = False
         try:
             brev = checkout
             movemarkfrom = None
             if not checkout:
+                warndest = True
                 updata = destutil.destupdate(repo)
                 checkout, movemarkfrom, brev = updata
             ret = hg.update(repo, checkout)
+            if warndest:
+                destutil.statusotherdests(ui, repo)
         except error.UpdateAbort as inst:
             msg = _("not updating: %s") % str(inst)
             hint = inst.hint

tests/test-largefiles-update.t

@@ -465,6 +465,7 Test that the internal linear merging wo
   keep (l)ocal ba94c2efe5b7c5e0af8d189295ce00553b0612b7 or
   take (o)ther e5bb990443d6a92aaf7223813720f7566c9dd05b? l
   2 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  1 other heads for branch "default"
 
   $ hg status -A large1
   M large1
@@ -498,6 +499,7 Test that the internal linear merging wo
   keep (l)ocal ba94c2efe5b7c5e0af8d189295ce00553b0612b7 or
   take (o)ther e5bb990443d6a92aaf7223813720f7566c9dd05b? l
   2 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  1 other heads for branch "default"
 
   $ hg status -A large1
   M large1

tests/test-pull-branch.t

@@ -133,6 +133,7 Should succeed because there is only one
   adding file changes
   added 4 changesets with 4 changes to 1 files (+1 heads)
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 other heads for branch "branchA"
 
 Make changes on new branch on tt