Improve --*base* documentation.

apachedex/__init__.py

@@ -407,20 +407,21 @@ def main():
   group.add_argument('--js-embed', action='store_true',
     help='Embed js files instead of linking to them.')
 
-  group = parser.add_argument_group('site matching')
+  group = parser.add_argument_group('site matching', 'Earlier arguments take '
+    'precedence. For example: --skip-base /foo/bar --base /foo generates '
+    'stats for /foo, excluding /foo/bar.')
   group.add_argument('-d', '--default',
     help='Caption for lines matching no prefix, or skip them if not provided.')
   group.add_argument('--base', dest='path', default=[], nargs='+',
     action=AggregateSiteUrl,
-    help='Absolute base url of some part of a site (see also '
-    '--erp5-base).')
+    help='Absolute base url(s) of some part of a site.')
   group.add_argument('--erp5-base', dest='path', nargs='+',
     action=AggregateSiteUrl,
-    help='Absolute base url of some part of an ERP5 site (extra '
-    'stats).')
+    help='Absolute base url(s) of some part of an ERP5 site (more '
+    'specific stats than --base).')
   group.add_argument('--skip-base', dest='path', nargs='+',
     action=AggregateSiteUrl,
-    help='Absolute base url to ignore.')
+    help='Absolute base url(s) to ignore.')
 
   args = parser.parse_args()
   line_regex = ''