Enable automatic command and one-liner doc. Reformat pydoc accordingly.

Add parser as an argument and parse_args hook in preparation to move parse_args at the right place, inside the CMDxx functions.

R.I.P. gclient_test.py

Review URL: http://codereview.chromium.org/2253002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@48271 0039d316-1c4b-4281-b951-d872f2087c98

PRESUBMIT.py

@@ -10,7 +10,6 @@ details on the presubmit API built into gcl.
 
 UNIT_TESTS = [
   'tests.gcl_unittest',
-  'tests.gclient_test',
   'tests.gclient_scm_test',
   'tests.gclient_utils_test',
   'tests.presubmit_unittest',

tests/gclient_smoketest.py

@@ -131,7 +131,7 @@ class GClientSmoke(GClientSmokeBase):
   def testCommands(self):
     """This test is to make sure no new command was added."""
     result = self.gclient(['help'])
-    self.assertEquals(3189, len(result[0]))
+    self.assertEquals(1197, len(result[0]))
     self.assertEquals(0, len(result[1]))
     self.assertEquals(0, result[2])