Remove duplicate words in docs. (#396)

doc/reference.rst

@@ -499,7 +499,7 @@ options.
 Section names
 -------------
 
-A section begins with a section and and, optionally, a condition in
+A section begins with a section and, optionally, a condition in
 square braces (``[`` and ``]``).
 
 A name can consist of any characters other than whitespace, square

doc/topics/meta-recipes.rst

@@ -152,7 +152,7 @@ So now, let's see the meta recipe that automates this::
     >>> exec(source)
 
 The meta recipe just adds parts to the buildout. It does this by
-setting items and and calling the ``parse`` method.  The ``parse``
+setting items and calling the ``parse`` method.  The ``parse``
 method just takes a string in buildout configuration syntax.  It's
 useful when we want to add static, or nearly static part data.  The
 setting items syntax is useful when we have non-trivial computation