demandimport: add urwid.command_map to ignore list

The useful pudb debugger can be used with Mercurial, but its import of urwid
fails when demandimport is enabled. Add urwid.command_map to the ignore list so
pudb can be used with hg without disabling all of demandimport.

mercurial/demandimport.py

@@ -297,6 +297,7 b' ignore = ['
     'distutils.msvc9compiler',
     '__builtin__',
     'builtins',
+    'urwid.command_map', # for pudb
     ]
 
 if _pypy:

tests/test-check-code.t

@@ -13,7 +13,7 b' New errors are not allowed. Warnings are'
    >             r.revision(r.node(x))
    don't convert rev to node before passing to revision(nodeorrev)
   Skipping i18n/polib.py it has no-che?k-code (glob)
-  mercurial/demandimport.py:313:
+  mercurial/demandimport.py:314:
    >     if os.environ.get('HGDEMANDIMPORT') != 'disable':
    use encoding.environ instead (py3)
   mercurial/encoding.py:54: