[bugfix] fromlist identifiers must not be unicode in Python 2
[bugfix] fromlist identifiers must not be unicode in Python 2

detached from I1d12bfa2

Change-Id: I6186954414192cb51d1364eba780adbc14dc8d99

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core