Fix suffix type in documentation also

PuneethaPai · PuneethaPai · commit 22cc686541a9 · 2020-05-22T19:48:23.000+05:30
diff --git a/doc/source/user_guide/merging.rst b/doc/source/user_guide/merging.rst
@@ -1270,7 +1270,7 @@ columns:
 
 .. ipython:: python
 
-   result = pd.merge(left, right, on='k', suffixes=['_l', '_r'])
+   result = pd.merge(left, right, on='k', suffixes=('_l', '_r'))
 
 .. ipython:: python
    :suppress:
