Add some commas.

docs/setuptools.txt

@@ -886,11 +886,11 @@ the path separator, even if you are on Windows.  Setuptools automatically
 converts slashes to appropriate platform-specific separators at build time.
 
 If datafiles are contained in a subdirectory of a package that isn't a package
-itself (no ``__init__.py``) then the subdirectory names (or ``*``) are required
+itself (no ``__init__.py``), then the subdirectory names (or ``*``) are required
 in the ``package_data`` argument (as shown above with ``'data/*.dat'``).
 
-When building an ``sdist`` the datafiles are also drawn from the
-``package_name.egg-info/SOURCES.txt`` file so make sure that this is removed if
+When building an ``sdist``, the datafiles are also drawn from the
+``package_name.egg-info/SOURCES.txt`` file, so make sure that this is removed if
 the ``setup.py`` ``package_data`` list is updated before calling ``setup.py``.
 
 (Note: although the ``package_data`` argument was previously only available in