fixed rst bug.

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@81351 62d5b8a3-27da-0310-9561-8e5933582275

src/zc/buildout/easy_install.txt

@@ -231,7 +231,7 @@ can be useful when debugging.
     d  demoneeded-1.1-py2.4.egg
 
 Specifying version information independent of requirements
----------------------------------------------------------
+----------------------------------------------------------
 
 Sometimes it's useful to specify version information independent of
 normal requirements specifications.  For example, a buildout may need