http: Improve coding style a bit.

caucase/http.py

@@ -445,7 +445,7 @@ def main(
     default=[],
     nargs='+',
     metavar='URL',
-    help='Origin values to always trust. default: none'
+    help='Origin values to always trust. default: none',
   )
   parser.add_argument(
     '--netloc',
@@ -538,7 +538,7 @@ def main(
     metavar='COUNT',
     help='Number service certificates which should be automatically signed on '
     'submission, excluding the one needed to serve caucase. '
-    'default: %(default)s'
+    'default: %(default)s',
   )
   user_group.add_argument(
     '--user-auto-approve-count',
@@ -548,6 +548,7 @@ def main(
     help='Number of user certificates which should be automatically signed on '
     'submission. default: %(default)s',
   )
+
   parser.add_argument(
     '--lock-auto-approve-count',
     action='store_true',
@@ -555,7 +556,7 @@ def main(
     'and --user-auto-approve-count values are stored inside caucase database '
     'and will not be altered by further invocations. Once the respective '
     'certificate issuance counters reach these values, no further '
-    'certificates will be ever automatically signed.'
+    'certificates will be ever automatically signed.',
   )
 
   backup_group = parser.add_argument_group(
@@ -573,7 +574,7 @@ def main(
     '--backup-period',
     default=1,
     type=float,
-    help='Number of days between backups. default: %(default)s'
+    help='Number of days between backups. default: %(default)s',
   )
   args = parser.parse_args(argv)