Patch by Eitan Adler.

Differential Revision:	http://reviews.llvm.org/D8514

llvm-svn: 234939

:doc:`...` and :ref:`...` links help Sphinx keep track the dependencies
between documents and ensure that they are not pointing to nowhere.

Raw HTML links work just fine and are easier for people less familiar
with reST/Sphinx. They are easy to change over to the :doc:/:ref: style
after the fact so this is not a problem.

This commit doesn't fix all of them.

llvm-svn: 205792

Before we learned about :doc:, we used :ref: and put a dummy link at the
top of each page. Don't do that anymore.

This fixes PR14891 as a special case.

llvm-svn: 172162

gives a nicer output than 'bash'.

llvm-svn: 169981

llvm-svn: 159199