DOC: make rename docs consistent (#36969)

erictleung · web-flow · commit 67dc97c464dc · 2020-10-08T18:08:27.000-04:00
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
@@ -4323,7 +4323,7 @@ def rename(
         Traceback (most recent call last):
         KeyError: ['C'] not found in axis
 
-        Using axis-style parameters
+        Using axis-style parameters:
 
         >>> df.rename(str.lower, axis='columns')
            a  b
