Due to the discussion in following SO question https://stackoverflow.com/questions/55933956/what-does-a-star-asterisk-do-in-f-string/55934472#55933956

and the inconsistency of the source behaviour with the documentation I think using `"*" or_expr` for f_expression is wrong or at least not what it meant to be and very vague. I was wondering if there's any reason for using `"*" or_expr` instead of let's say just `expr` which I think is what the `or_expr` identifier is intended to be.