commas after introductory phrases

docs/index.rst

@@ -10,7 +10,7 @@ Welcome to Flask
 Welcome to Flask's documentation.  This documentation is divided into
 different parts.  I recommend that you get started with
 :ref:`installation` and then head over to the :ref:`quickstart`.
-Besides the quickstart there is also a more detailed :ref:`tutorial` that
+Besides the quickstart, there is also a more detailed :ref:`tutorial` that
 shows how to create a complete (albeit small) application with Flask.  If
 you'd rather dive into the internals of Flask, check out
 the :ref:`api` documentation.  Common patterns are described in the
@@ -18,7 +18,7 @@ the :ref:`api` documentation.  Common patterns are described in the
 
 Flask depends on two external libraries: the `Jinja2`_ template
 engine and the `Werkzeug`_ WSGI toolkit.  These libraries are not documented
-here.  If you want to dive into their documentation check out the
+here.  If you want to dive into their documentation, check out the
 following links:
 
 -   `Jinja2 Documentation <http://jinja.pocoo.org/2/documentation/>`_