[bugfix] Fix Python 2 Unicode error in page.py
[bugfix] Fix Python 2 Unicode error in page.py

Bug: T222623
Change-Id: Ida6af7b8971626d77a3b8aac3291b737c882bf4b

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