Fix underlines that were too short.

Author: Mark van Lent

docs/intro/learning.rst

@@ -130,7 +130,7 @@ no previous programming experience.
 
 
 Learn to Program in Python with Codeacademy
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+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 A Codeacademy course for the absolute Python beginner. This free and interactive course provides and teaches the basics (and beyond) of Python programming whilst testing the user's knowledge in between progress.
 

docs/intro/news.rst

@@ -41,7 +41,7 @@ Python News is the news section in the official Python web site
     `Python News <http://www.python.org/news/>`_
 
 Import Python Weekly
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+~~~~~~~~~~~~~~~~~~~~
 
 Weekly Python Newsletter containing Python Articles, Projects, Videos, Tweets
 delivered in your inbox.  Keep Your Python Programming Skills Updated.