docs: Strip trailing whitespace.

Signed-off-by: Tim 'mithro' Ansell <me@mith.ro>

README.rst

diff --git a/README.rst b/README.rst
index 7ac5005..64b402a 100644
--- a/README.rst
+++ b/README.rst
@@ -5,7 +5,7 @@
 .. image:: https://readthedocs.org/projects/python-symbiflow-v2x/badge/?version=latest
    :target: https://python-symbiflow-v2x.readthedocs.io/en/latest/?badge=latest
    :alt: Documentation Status
- 
+
 .. image:: https://travis-ci.com/SymbiFlow/python-symbiflow-v2x.svg?branch=master
    :target: https://travis-ci.com/SymbiFlow/python-symbiflow-v2x
    :alt: Build Status
@@ -63,13 +63,13 @@
                            Output file type, possible values are: pb_type and
                            model. Default value is pb_type
 
-For example, to generate a pb_type xml file from adder.v, run 
+For example, to generate a pb_type xml file from adder.v, run
 
 .. code-block::
 
    v2x -o adder.pb_type.xml adder.v
 
-Or, to generate a model xml file, run 
+Or, to generate a model xml file, run
 
 .. code-block::