[PATCH 1 of 5] util: reword debugstacktrace comment

[timeless]

# HG changeset patch
# User timeless <timeless at mozdev.org>
# Date 1457715014 0
#      Fri Mar 11 16:50:14 2016 +0000
# Node ID b3b25012e74bb276782957f5126ef16833cf14e2
# Parent  1c658391b22fb4d98ccfb60c0e57315b55634117
util: reword debugstacktrace comment

diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -2553,7 +2553,7 @@
 def debugstacktrace(msg='stacktrace', skip=0, f=sys.stderr, otherf=sys.stdout):
     '''Writes a message to f (stderr) with a nicely formatted stacktrace.
     Skips the 'skip' last entries. By default it will flush stdout first.
-    It can be used everywhere and do intentionally not require an ui object.
+    It can be used everywhere and intentionally does not require an ui object.
     Not be used in production code but very convenient while developing.
     '''
     if otherf: