[eporner] add support (#8581)

* [eporner] Add support
* Line-length <80 chars
* Fix flake8 indentation
* update
    - generalize example URL
    - strip "Photo Gallery" from 'title'
    - extract 'id'
* update supportedsites
* update test results

test/results/eporner.py

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+
+# 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
+# published by the Free Software Foundation.
+
+from gallery_dl.extractor import eporner
+
+
+__tests__ = (
+{
+    "#url"     : "https://www.eporner.com/gallery/mHNhErACQFE/NaughtyAmerica-Lolly-Dames-My-Wife-s-Hot-Friend-Big-Booty-Big-Tits-Lolly-Dames-Gets-Her-Pussy-Slammed-Hard/",
+    "#class"   : eporner.EpornerGalleryExtractor,
+    "#pattern" : r"https://static\-eu\-cdn\.eporner\.com/gallery/FE/CQ/mHNhErACQFE/\d+\-image\-\d+\.jpg",
+    "#count"   : 261,
+
+    "count"      : 261,
+    "num"        : range(1, 261),
+    "description": "NaughtyAmerica Lolly Dames - My Wife's Hot Friend - Big Booty Big Tits Lolly Dames Gets Her Pussy Slammed Hard sexy gallery with 261 pics. Eporner is the largest hd porn source.",
+    "extension"  : "jpg",
+    "filename"   : r"re:^\d+\-image\-\d+$",
+    "gallery_id" : "mHNhErACQFE",
+    "id"         : r"re:^\d+$",
+    "slug"       : "NaughtyAmerica-Lolly-Dames-My-Wife-s-Hot-Friend-Big-Booty-Big-Tits-Lolly-Dames-Gets-Her-Pussy-Slammed-Hard",
+    "title"      : "NaughtyAmerica Lolly Dames - My Wife's Hot Friend - Big Booty Big Tits Lolly Dames Gets Her Pussy Slammed Hard",
+    "tags"       : [
+        "cumshot",
+        "hardcore",
+        "blowjob",
+        "mature",
+        "housewives",
+        "big tits",
+        "blonde",
+        "big ass",
+        "milf",
+    ],
+},
+
+{
+    "#url"     : "https://www.eporner.com/gallery/mHNhErACQFE",
+    "#class"   : eporner.EpornerGalleryExtractor,
+},
+
+)