PEP 8 compliance and small modification to mime.types file

etc/mime.types-sample

@@ -3,3 +3,8 @@
 # Please enter Mime-Types in standard mime.types format #
 # Mime-Type Extension ex. image/jpeg jpg                #
 #########################################################
+
+#EX. Mime-Type Extension
+#    foo/bar   foo
+
+

swift/proxy/server.py

@@ -1268,7 +1268,8 @@ class BaseApplication(object):
         self.account_ring = account_ring or \
             Ring(os.path.join(swift_dir, 'account.ring.gz'))
         self.memcache = memcache
-        mimetypes.init(mimetypes.knownfiles + [os.path.join(self.swift_dir, 'mime.types')])
+        mimetypes.init(mimetypes.knownfiles + 
+                       [os.path.join(self.swift_dir, 'mime.types')])
 
     def get_controller(self, path):
         """