Added sorting on counter and passed all tests

IPython/lib/pretty.py

@@ -918,7 +918,7 b' def _counter_pprint(obj, p, cycle):'
     if cycle:
         p.pretty(cls_ctor(RawText("...")))
     elif len(obj):
-        p.pretty(cls_ctor(dict(obj)))
+        p.pretty(cls_ctor(dict(sorted(obj.items(), key=lambda x: x[1], reverse=True))))
     else:
         p.pretty(cls_ctor())
 

IPython/lib/tests/test_pretty.py

@@ -422,6 +422,7 b' def test_collections_counter():'
         (Counter(), 'Counter()'),
         (Counter(a=1), "Counter({'a': 1})"),
         (MyCounter(a=1), "MyCounter({'a': 1})"),
+        (Counter(a=1, c=22), "Counter({'c': 22, 'a': 1})")
     ]
     for obj, expected in cases:
         assert pretty.pretty(obj) == expected