Improve comments based on PR #351 review

letsencrypt/client/plugins/nginx/configurator.py

@@ -26,7 +26,8 @@ class NginxConfigurator(object):
     # pylint: disable=too-many-instance-attributes,too-many-public-methods
     """Nginx configurator.
 
-    .. todo:: Add proper support for comments in the config
+    .. todo:: Add proper support for comments in the config. Currently,
+        config files modified by the configurator will lose all their comments.
 
     :ivar config: Configuration.
     :type config: :class:`~letsencrypt.client.interfaces.IConfig`

setup.py

@@ -37,7 +37,7 @@ install_requires = [
     'pyasn1',  # urllib3 InsecurePlatformWarning (#304)
     'pycrypto',
     'PyOpenSSL',
-    'pyparsing>=1.5.5',
+    'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?
     'pyrfc3339',
     'python-augeas',
     'python2-pythondialog>=3.2.2rc1',  # Debian squeeze support, cf. #280