# HG changeset patch
# User Boris Feld <boris.feld@octobus.net>
# Date 2017-12-10 20:42:33
# Node ID c9eb92fb87b7f6b86904dffd0691300ab52f6f46
# Parent  2f54a3e228ffcf9e92f9b7a45b1dfafefa94711f

showstack: add an extension docstring

Now, running `hg help showstack` will give details on how to use the extension.

diff --git a/contrib/showstack.py b/contrib/showstack.py
--- a/contrib/showstack.py
+++ b/contrib/showstack.py
@@ -1,6 +1,8 @@
 # showstack.py - extension to dump a Python stack trace on signal
 #
 # binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
+"""dump stack trace when receiving SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
+"""
 
 from __future__ import absolute_import
 import signal