push: `exchange.push` now returns the `pushoperation` object

Returning the pushop object gives access to more information (upcoming bookmark
push result for example). `localrepo.push` currently extracts the `cgresult` for
callers.

mercurial/exchange.py

@@ -211,7 +211,7 b' def push(repo, remote, force=False, revs'
         if locallock is not None:
             locallock.release()
 
-    return pushop.cgresult
+    return pushop
 
 # list of steps to perform discovery before push
 pushdiscoveryorder = []

mercurial/localrepo.py

@@ -1592,7 +1592,7 b' class localrepository(object):'
         return util.hooks()
 
     def push(self, remote, force=False, revs=None, newbranch=False):
-        return exchange.push(self, remote, force, revs, newbranch)
+        return exchange.push(self, remote, force, revs, newbranch).cgresult
 
     def stream_in(self, remote, requirements):
         lock = self.lock()