DOC: correct alignment of GH6756

doc/source/groupby.rst

@@ -666,21 +666,21 @@ The dimension of the returned result can also change:
 
 .. warning::
 
-		In the current implementation apply calls func twice on the
-		first group to decide whether it can take a fast or slow code
-		path. This can lead to unexpected behavior if func has
-		side-effects, as they will take effect twice for the first
-		group.
+    In the current implementation apply calls func twice on the
+    first group to decide whether it can take a fast or slow code
+    path. This can lead to unexpected behavior if func has
+    side-effects, as they will take effect twice for the first
+    group.
 
     .. ipython:: python
-    
+
         d = DataFrame({"a":["x", "y"], "b":[1,2]})
         def identity(df):
-          print df
-          return df
-    
+            print df
+            return df
+
         d.groupby("a").apply(identity)
-      
+
 
 Other useful features
 ---------------------