DOC: merging.rst changes

Author: jreback

doc/source/merging.rst

@@ -51,6 +51,7 @@ takes a list or dict of homogeneously-typed objects and concatenates them with
 some configurable handling of "what to do with the other axes":
 
 ::
+
     concat(objs, axis=0, join='outer', join_axes=None, ignore_index=False,
            keys=None, levels=None, names=None, verify_integrity=False)
 
@@ -101,12 +102,12 @@ functionality below.
 
 .. note::
    It is worth noting however, that ``concat`` (and therefore ``append``) makes
-   a full copy of the data, and that constantly reusing this function can 
-   create a signifcant performance hit. If you need to use the operation over 
-   several datasets, use a list comprehension. 
+   a full copy of the data, and that constantly reusing this function can
+   create a signifcant performance hit. If you need to use the operation over
+   several datasets, use a list comprehension.
 
 ::
-   
+
    frames = [ process_your_file(f) for f in files ]
    result = pd.concat(frames)