A fairly trivial change since `Role Name` and `Example Playbook`
will likely be modified anyways.  However, since all the other
sections are aligned properly, felt it would be nice to "clean this up".

Before:

    Role Name
    ========

    Example Playbook
    -------------------------

After:

    Role Name
    =========

    Example Playbook
    ----------------

timeit shows a speedup of ~3x on Python 2.7.5 x86_64.
It also makes the code a bit shorter.

Fixes 5397

This may still be an issue if users create roles with a '.' in the name though.
We will probably have to disallow that in the role naming convention.

<command>