Fix formatting.

src/zc/buildout/buildout.py

@@ -367,7 +367,7 @@ class Buildout(UserDict.DictMixin):
                 options['__networkcache__upload-cache-url'] = self.upload_cache_url
                 options['__networkcache__upload-dir-url'] = self.upload_dir_url
             else:
-                self._logger.warning('Networkcache functionality not enabled.'
+                self._logger.warning('Networkcache functionality not enabled. '
                     'In order to activate use networkcache-section.')
                 self.download_cache_url = None
                 self.download_dir_url = None