Bug 1159318 - make docs/makedocs.pl and extensions/create.pl agree on the name…

template/en/default/extensions/name.rst.tmpl

-[%# This Source Code Form is subject to the terms of the Mozilla Public
-  # License, v. 2.0. If a copy of the MPL was not distributed with this
-  # file, You can obtain one at http://mozilla.org/MPL/2.0/.
-  #
-  # This Source Code Form is "Incompatible With Secondary Licenses", as
-  # defined by the Mozilla Public License, v. 2.0.
-  #%]
-
-[%# INTERFACE:
-  # name: string; the name of the extension.
-  #%]
-
-[% USE String('#') %]
-[% name %]
-[%+ String.repeat(name.length) %]
-
-This is a sample documentation file for the [% name %] extension. Like all of
-the Bugzilla docs, it's written in
-`reStructured Text (reST) format <http://sphinx-doc.org/latest/rest.html>`_
-and will be compiled by `Sphinx <http://sphinx-doc.org/>`_.
-
-If you build the docs yourself using :file:`makedocs.pl`, this file will get
-incorporated into the Extensions chapter.