TYP: DataFrame.to_gbq, DataFrame.to_html (easy: copy-paste from format module)
- [ ] closes #xxxx
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Spinning off from #38416
thanks @arw2019 