Merge pull request piskvorky#357 from lukaselmer/patch-1

Update doc comment to match implementation

gensim/corpora/wikicorpus.py

@@ -184,7 +184,7 @@ def extract_pages(f, filter_namespaces=False):
     """
     Extract pages from MediaWiki database dump.
 
-    Return an iterable over (str, str) which generates (title, content) pairs.
+    Return an iterable over (str, str, str) which generates (title, content, pageid) triplets.
 
     """
     elems = (elem for _, elem in iterparse(f, events=("end",)))