[PATCH] cmdutil: typo fix in comment

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1462558937 14400
#      Fri May 06 14:22:17 2016 -0400
# Node ID 60506021d5a0b3d18cb81eadba23688ee75ff022
# Parent  fe50341de1fff843ae633d7ad7be908100c09cdc
cmdutil: typo fix in comment

diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -3071,7 +3071,7 @@ def revert(ui, repo, ctx, parents, *pats
 
             # tell newly modified apart.
             dsmodified &= modified
-            dsmodified |= modified & dsadded # dirstate added may needs backup
+            dsmodified |= modified & dsadded # dirstate added may need backup
             modified -= dsmodified
 
             # We need to wait for some post-processing to update this set