DOC: DataFrame MERGE Example
In the Docstring for the **Merge** method, the example provided:

```
merge(A, B, left_on='lkey', right_on='rkey', how='outer')  
```

returns a _sorted_ DataFrame. Thus, we need to either add a **sort=True** _kwarg_ to the above code or replace the purported output with the actual (unsorted) output:

```
  lkey  value_x rkey  value_y
0  foo        1  foo        5
1  foo        4  foo        5
2  bar        2  bar        6
3  bar        2  bar        8
4  baz        3  NaN      NaN
5  NaN      NaN  qux        7
```
