[tmohentai] 'categories' -> 'genres'

quite likely that the site meant 'genres' by "Genders"

gallery_dl/extractor/tmohentai.py

@@ -38,7 +38,7 @@ class TmohentaiGalleryExtractor(GalleryExtractor):
             "title"     : text.unescape(extr("<h3>", "<").strip()),
             "artists"   : text.split_html(extr(
                 "<label>Artists and Artists Groups</label>", "</ul>")),
-            "categories": text.split_html(extr(
+            "genres"    : text.split_html(extr(
                 "<label>Genders</label>", "</ul>")),
             "tags"      : text.split_html(extr(
                 "<label>Tags</label>", "</ul>")),

test/results/tmohentai.py

@@ -16,7 +16,7 @@ __tests__ = (
     "#count"   : 46,
 
     "artists"   : ["Andoryu"],
-    "categories": [
+    "genres"    : [
         "Big Breasts",
         "BlowJob",
         "Cheating",