push: don't treat bookmark as a found change

Treating bookmarks as a found change results in confusing
documentation or output and is less useful for scripting.

mercurial/commands.py

@@ -4451,7 +4451,6 def push(ui, repo, dest=None, **opts):
                 ui.warn(_('updating bookmark %s failed!\n') % b)
                 if not result:
                     result = 2
-            result = 0
 
     return result
 

tests/test-bookmarks-pushpull.t

@@ -58,6 +58,7 export bookmark by name
   searching for changes
   no changes found
   exporting bookmark W
+  [1]
   $ hg -R ../a bookmarks
      W                         -1:000000000000
      X                         0:4e3505fd9583
@@ -72,6 +73,7 delete a remote bookmark
   searching for changes
   no changes found
   deleting remote bookmark W
+  [1]
 
 push/pull name that doesn't exist
 
@@ -169,6 +171,7 hgweb
   searching for changes
   no changes found
   exporting bookmark Z
+  [1]
   $ hg book -d Z
   $ hg in -B http://localhost:$HGPORT/
   comparing with http://localhost:$HGPORT/

tests/test-hook.t

@@ -181,6 +181,7 pushkey hook
   no changes found
   exporting bookmark foo
   pushkey hook: HG_KEY=foo HG_NAMESPACE=bookmarks HG_NEW=0000000000000000000000000000000000000000 HG_RET=1 
+  [1]
   $ cd ../a
 
 listkeys hook

tests/test-ssh.t

@@ -177,6 +177,7 test pushkeys and bookmarks
   searching for changes
   no changes found
   exporting bookmark foo
+  [1]
   $ hg debugpushkey --config ui.ssh="python $TESTDIR/dummyssh" ssh://user@dummy/remote bookmarks
   foo	1160648e36cec0054048a7edc4110c6f84fde594
   $ hg book -f foo
@@ -203,6 +204,7 test pushkeys and bookmarks
   searching for changes
   no changes found
   deleting remote bookmark foo
+  [1]
 
 a bad, evil hook that prints to stdout