makes dictionary key completion use same delimiters as splitter

IPython/core/completer.py

@@ -418,7 +418,7 b' def get__all__entries(obj):'
     return [w for w in words if isinstance(w, string_types)]
 
 
-def match_dict_keys(keys, prefix):
+def match_dict_keys(keys, prefix, delims):
     """Used by dict_key_matches, matching the prefix to a list of keys"""
     if not prefix:
         return None, 0, [repr(k) for k in keys
@@ -429,8 +429,9 b' def match_dict_keys(keys, prefix):'
         prefix_str = eval(prefix + quote, {})
     except Exception:
         return None, 0, []
-    
-    token_match = re.search(r'\w*$', prefix, re.UNICODE)
+
+    pattern = '[^' + ''.join('\\' + c for c in delims) + ']*$'
+    token_match = re.search(pattern, prefix, re.UNICODE)
     token_start = token_match.start()
     token_prefix = token_match.group()
 
@@ -973,7 +974,7 b' class IPCompleter(Completer):'
         keys = get_keys(obj)
         if not keys:
             return keys
-        closing_quote, token_offset, matches = match_dict_keys(keys, prefix)
+        closing_quote, token_offset, matches = match_dict_keys(keys, prefix, self.splitter.delims)
         if not matches:
             return matches
         

IPython/core/tests/test_completer.py

@@ -530,6 +530,11 b' def test_dict_key_completion_string():'
     _, matches = complete(line_buffer="d[\"a'")
     nt.assert_in("b", matches)
 
+    # need to not split at delims that readline won't split at
+    if '-' not in ip.Completer.splitter.delims:
+        ip.user_ns['d'] = {'before-after': None}
+        _, matches = complete(line_buffer="d['before-af")
+        nt.assert_in('before-after', matches)
 
 def test_dict_key_completion_contexts():
     """Test expression contexts in which dict key completion occurs"""