[PATCH 1 of 2] check-seclevel: fix file description grammar

[timeless at mozdev.org]

# HG changeset patch
# User timeless at mozdev.org
# Date 1441731279 14400
#      Tue Sep 08 12:54:39 2015 -0400
# Node ID ad3db91618a5838a4d74a056ef7f2fe425ce4076
# Parent  7187f6e923d55cf6b7e6910d24645f303db671ee
check-seclevel: fix file description grammar

diff --git a/doc/check-seclevel.py b/doc/check-seclevel.py
--- a/doc/check-seclevel.py
+++ b/doc/check-seclevel.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# checkseclevel - checking section title levels in each online help documents
+# checkseclevel - checking section title levels in each online help document
 
 import sys, os
 import optparse