Adding a space and new line to match PEP8. #21510

Author: SaturninoMateus

pandas/core/reshape/concat.py

@@ -250,7 +250,7 @@ def __init__(self, objs, axis=0, join='outer', join_axes=None,
 
         if isinstance(objs, dict):
             if keys is None:
-                if not isinstance(objs,OrderedDict):
+                if not isinstance(objs, OrderedDict):
                     keys = sorted(objs)
                 else:
                     keys = objs