[wikimedia] update documentation and test for 'image-revisions'

docs/configuration.rst

@@ -6560,6 +6560,9 @@ Description
     The dafault value of 1 only returns the latest revision.
 
     The value must be between 1 and 500.
+Note
+    The API sometimes returns image revisions on article pages even when this option is
+    set to 1. However, setting it to a higher value may reduce the number of API requests.
 
 
 extractor.wikimedia.limit

test/results/wikipedia.py

@@ -45,16 +45,12 @@ __tests__ = (
 },
 
 {
-    "#url"     : "https://tl.wikipedia.org/wiki/Sitosol",
-    "#comment" : "revisions of an image in an article",
+    "#url"     : "https://en.wikipedia.org/wiki/Title",
+    "#comment" : "force download revisions of images in an article",
     "#category": ("wikimedia", "wikipedia", "article"),
     "#class"   : wikimedia.WikimediaArticleExtractor,
-    "#options" : {"image-revisions": 10},
-    "#count"   : 2,
-    "#pattern" : (
-        r"https://upload.wikimedia.org/wikipedia/commons/2/2e/Crowded_cytosol.png",
-        r"https://upload.wikimedia.org/wikipedia/commons/archive/2/2e/20080911161129%21Crowded_cytosol.png",
-    ),
+    "#options" : {"image-revisions": 5},
+    "#count"   : "> 8",
 },
 
 {