2.2.0
f-strings everywhere
with_appcontext lasts for the lifetime of the click context
prefer --app over FLASK_APP in docs
remove FLASK_ENV from docs
rewrite tutorial docs and example
Fix typo in docs/tutorial/index.rst
replace nbsp characters
remove unused ref directives
add missing port to localhost URL
Replace old pocoo links everywhere
update tests for relative redirects
safer check for existing user in tutorial
