[mtv] Update tests and xpath function for new title extraction

youtube_dl/extractor/mtv.py

@@ -180,7 +180,7 @@ class MTVIggyIE(MTVServicesInfoExtractor):
         'info_dict': {
             'id': '984696',
             'ext': 'mp4',
-            'title': 'Short',
+            'title': 'Arcade Fire: Behind the Scenes at the Biggest Music Experiment Yet',
         }
     }
     _FEED_URL = 'http://all.mtvworldverticals.com/feed-xml/'

youtube_dl/extractor/spike.py

@@ -11,7 +11,7 @@ class SpikeIE(MTVServicesInfoExtractor):
         'info_dict': {
             'id': 'b9c8221a-4e50-479a-b86d-3333323e38ba',
             'ext': 'mp4',
-            'title': 'Can Allen Ride A Hundred Year-Old Motorcycle?',
+            'title': 'Auction Hunters|Can Allen Ride A Hundred Year-Old Motorcycle?',
             'description': 'md5:fbed7e82ed5fad493615b3094a9499cb',
         },
     }

youtube_dl/utils.py

@@ -224,7 +224,7 @@ if sys.version_info >= (2,7):
     def find_xpath_attr(node, xpath, key, val):
         """ Find the xpath xpath[@key=val] """
         assert re.match(r'^[a-zA-Z]+$', key)
-        assert re.match(r'^[a-zA-Z0-9@\s:.]*$', val)
+        assert re.match(r'^[a-zA-Z0-9@\s:._]*$', val)
         expr = xpath + u"[@%s='%s']" % (key, val)
         return node.find(expr)
 else: