Learnt about t-strings from @davepeck and @pauleveritt at #FlaskCon-
the formatting is the exact same as f-strings, but the return type is a Template object with a mix of strings and interpolated values.

#PyconUS

@pamelafox And I learnt a bunch about next steps in Python testing zen, and still have more to learn. Especially a11y. Thanks for pushing on that theme.