Clarify how a blank line between imports looks like

Author: tiagoboldt

peps/pep-0008.rst

@@ -382,7 +382,15 @@ Imports
   2. Related third party imports.
   3. Local application/library specific imports.
 
-  You should put a blank line between each group of imports.
+  You should put a blank line between each group of imports:
+
+  .. code-block::
+     import os
+     import sys
+
+     import mypkg.sibling
+     from mypkg import sibling
+     from mypkg.sibling import example
 
 - Absolute imports are recommended, as they are usually more readable
   and tend to be better behaved (or at least give better error