def getChallenge(peer):
Image alt attribute can be empty.
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/protocols/sip.py/IAuthorizer.getChallenge--crossover with--dataset/ETHPy150Open mozilla/kitsune/kitsune/sumo/tests/test_parser.py/TestWikiImageTags.test_alt_empty