Pywikibot creates a page items with a label equivalent to the page name. See [[https://phabricator.wikimedia.org/diffusion/PWBC/browse/master/pywikibot/bot.py | pywikibot.bot.create_item_for_page() ]].
Could you add the ability to set another label via the `data` parameter?
Because on Wikisource all encyclopedia pages have prefixes and suffixes ([[ https://www.wikidata.org/wiki/Q24509724 | Q24509724 ]], [[ https://www.wikidata.org/wiki/Q21281526 | Q21281526 ]], etc.). And traditionally labels for them are created with spaces around slashes separating prefixes and suffixes, the bot don't make it (example [[ https://www.wikidata.org/wiki/Q85899318 | Q85899318 ]]).
Moreover, the consensus about naming is not clear, because according the [[ https://www.wikidata.org/wiki/Help:Label#Wikimedia_page_title_may_give_orientation | proposed rule of Wikidata ]] the names of items should be named equivalent to the article’s own name. Currently, this method remove a disambiguation information only from brackets in page name. But it don't know nothing about such prefixes and suffix, which usually are a mark of disambiguation information about the orphography/edition of page. (Like, //ЭСБЕ/А//, //ЭСБЕ/А/ДО//, //ВЭ/ВТ/А//, //ТСД/А/ДО//, //ТСД/А//, etc. Where 'A' is article name ; prefix is the enc. abbr.; 'ВТ', 'ДО', 'СО' - page orphography.)