[IMPR] Improvements for cosmetic_changes.py
[IMPR] Improvements for cosmetic_changes.py

- use AutomaticTWSummaryBot
- use BasicBot handle generator option
- use current_page.text instead of get()  method
- use gen_factory.handle_args() method
- use pywikibot.bot.suggest_help() result to run the bot

Change-Id: I2e5cfa4d2199447943aa4ff66df369dca52ae0b7

wikimedia/pywikibot-core,wikimedia/pywikibot-core