[PATCH 1 of 2] pushoperation: fix language issues in docstring

[Nathan Goldbaum]

# HG changeset patch
# User Nathan Goldbaum <ngoldbau at illinois.edu>
# Date 1457652698 21600
#      Thu Mar 10 17:31:38 2016 -0600
# Node ID 4cbd3237f1e5b4f442c4ee527d977ace2f6ce619
# Parent  1c658391b22fb4d98ccfb60c0e57315b55634117
pushoperation: fix language issues in docstring

diff -r 1c658391b22f -r 4cbd3237f1e5 mercurial/exchange.py
--- a/mercurial/exchange.py	Tue Mar 08 00:20:08 2016 -0800
+++ b/mercurial/exchange.py	Thu Mar 10 17:31:38 2016 -0600
@@ -266,10 +266,10 @@ def _canusebundle2(op):
 class pushoperation(object):
     """A object that represent a single push operation
 
-    It purpose is to carry push related state and very common operation.
+    Its purpose is to carry push related state and very common operations.
 
-    A new should be created at the beginning of each push and discarded
-    afterward.
+    A new pushoperation should be created at the beginning of each push and
+    discarded afterward.
     """
 
     def __init__(self, repo, remote, force=False, revs=None, newbranch=False,