simplify extractor constants

- single strings for URL patterns
- tuples instead of lists for 'directory_fmt' and 'test'
- single-tuple tests where applicable

gallery_dl/extractor/mangapanda.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 
-# Copyright 2015-2018 Mike Fährmann
+# Copyright 2015-2019 Mike Fährmann
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 as
@@ -19,17 +19,17 @@ class MangapandaBase():
 
 class MangapandaMangaExtractor(MangapandaBase, MangareaderMangaExtractor):
     """Extractor for manga from mangapanda.com"""
-    pattern = [r"(?:https?://)?((?:www\.)?mangapanda\.com/[^/?&#]+)/?$"]
-    test = [("https://www.mangapanda.com/mushishi", {
+    pattern = r"(?:https?://)?((?:www\.)?mangapanda\.com/[^/?&#]+)/?$"
+    test = ("https://www.mangapanda.com/mushishi", {
         "url": "357f965732371cac1990fee8b480f62e29141a42",
         "keyword": "031b3ea085921c552de017ecbb9b906e462229c9",
-    })]
+    })
 
 
 class MangapandaChapterExtractor(MangapandaBase, MangareaderChapterExtractor):
     """Extractor for manga-chapters from mangapanda.com"""
-    pattern = [r"(?:https?://)?(?:www\.)?mangapanda\.com((/[^/?&#]+)/(\d+))"]
-    test = [("https://www.mangapanda.com/red-storm/2", {
+    pattern = r"(?:https?://)?(?:www\.)?mangapanda\.com((/[^/?&#]+)/(\d+))"
+    test = ("https://www.mangapanda.com/red-storm/2", {
         "url": "1f633f776e950531ba9b1e81965316458e785261",
         "keyword": "32b5e84017c2bf5f122b339ecf40899e41f18cc9",
-    })]
+    })