Add doc8 documentation style checking

- add dev dependency
- add doc8 to tasks.py
- fix all doc8 errors

1 files changed, 6 insertions, 5 deletions

diff --git a/docs/overview/summary.rst b/docs/overview/summary.rst
index b59c86c2..9285014c 100644
--- a/docs/overview/summary.rst
+++ b/docs/overview/summary.rst
@@ -5,17 +5,18 @@ Building a new `REPL <https://en.wikipedia.org/wiki/Read–eval–print_loop>`_
 `Command Line Interface <https://en.wikipedia.org/wiki/Command-line_interface>`_
 application?
 
-Already built an application that uses cmd_ from the python standard library and
-want to add more functionality with very little work?
+Already built an application that uses cmd_ from the python standard library
+and want to add more functionality with very little work?
 
 ``cmd2`` is a powerful python library for building command line applications.
 Start here to find out if this library is a good fit for your needs.
 
 * :ref:`overview/installation:Installation Instructions` - how to install
   ``cmd2`` and associated optional dependencies
-* :ref:`examples/first_app:First Application` - a sample application showing 8 key features of ``cmd2``
-* :ref:`overview/integrating:Integrate cmd2 Into Your Project` - adding ``cmd2``
-  to your project
+* :ref:`examples/first_app:First Application` - a sample application showing 8
+  key features of ``cmd2``
+* :ref:`overview/integrating:Integrate cmd2 Into Your Project` - adding
+  ``cmd2`` to your project
 * :ref:`overview/alternatives:Alternatives` - other python packages that might
   meet your needs
 * :ref:`overview/resources:Resources` - related links and other materials