fix syntax error (another newline) in testing.rst, rst files

pizzathief · pizzathief · commit 19965132256a · 2016-01-23T00:39:04.000+11:00
are not python!
diff --git a/doc/devel/testing.rst b/doc/devel/testing.rst
@@ -35,8 +35,7 @@ Optionally you can install:
 
   - `pytest-cov <https://pypi.python.org/pypi/pytest-cov>`_ for coverage stats in pytest
 
-  - `pytest-pep8 <https://pypi.python.org/pypi/pytest-pep8>`_ for pep8
-   conformance in pytest
+  - `pytest-pep8 <https://pypi.python.org/pypi/pytest-pep8>`_ for pep8 conformance in pytest
 
 Building matplotlib for image comparison tests
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