Make hg glog abort if unused arguments are given.

hgext/graphlog.py

@@ -141,7 +141,7 b' def get_revs(repo, rev_opt):'
     else:
         return (repo.changelog.count() - 1, 0)
 
-def graphlog(ui, repo, *args, **opts):
+def graphlog(ui, repo, **opts):
     """show revision history alongside an ASCII revision graph
 
     Print a revision history alongside a revision graph drawn with

tests/test-glog

@@ -138,3 +138,6 b' hg glog -q'
 
 echo % glog
 hg glog
+
+echo % unused arguments
+hg glog -q foo || echo failed

tests/test-glog.out

@@ -307,3 +307,9 b' o changeset: 0:7aa22e58e8c1'
    date:        Thu Jan 01 00:00:00 1970 +0000
    summary:     (0) root
 
+% unused arguments
+hg glog: invalid arguments
+hg glog [OPTION]...
+
+show revision history alongside an ASCII revision graph
+failed