Linting indentation fix

Author: ryankarlos

doc/source/user_guide/merging.rst

@@ -735,11 +735,11 @@ using :meth:`Series.reset_index`.
 
    # The series has a multi-index with levels corresponding to columns in
    # the DataFrame we want to merge with
-   ser = pd.Series(
-       ['a', 'b', 'c', 'd', 'e', 'f'],
-       index=pd.MultiIndex.from_arrays([["A", "B", "C"] * 2,
-       [1, 2, 3, 4, 5, 6]], names=['Let', 'Num'])
-       )
+   ser = pd.Series(['a', 'b', 'c', 'd', 'e', 'f'],
+                   index=pd.MultiIndex.from_arrays([["A", "B", "C"] * 2,
+                                                    [1, 2, 3, 4, 5, 6]],
+                                                   names=['Let', 'Num'])
+                   )
    ser
 
    # Convert the Series to a DataFrame and merge