Fix rst header markers

Author: Ivoz

docs/changes.rst

@@ -2,7 +2,7 @@ Release History
 ===============
 
 13.2.0 (unreleased)
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 * Added support for ``python-config`` script
 
@@ -13,12 +13,12 @@ Release History
 * Updated activate.fish (PR #589)
 
 13.1.2 (2015-08-23)
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 * Upgrade pip to 7.1.2.
 
 13.1.1 (2015-08-20)
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 * Upgrade pip to 7.1.1.
 
@@ -27,35 +27,35 @@ Release History
 * Make the activate script safe to use when bash is running with ``-u``.
 
 13.1.0 (2015-06-30)
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 * Upgrade pip to 7.1.0
 
 * Upgrade setuptools to 18.0.1
 
 
 13.0.3 (2015-06-01)
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 * Upgrade pip to 7.0.3
 
 
 13.0.2 (2015-06-01)
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 * Upgrade pip to 7.0.2
 
 * Upgrade setuptools to 17.0
 
 
 13.0.1 (2015-05-22)
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 * Upgrade pip to 7.0.1
 
 
 13.0.0 (2015-05-21)
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 * Automatically install wheel when creating a new virutalenv. This can be
   disabled by using the ``--no-wheel`` option.
@@ -69,13 +69,13 @@ Release History
 
 
 12.1.1 (2015-04-07)
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 * Upgrade pip to 6.1.1
 
 
 12.1.0 (2015-04-07)
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 * Upgrade setuptools to 15.0