for / while else doesn't make sense

[gst]

I know this does not bring anything valuable but:

Definitively agree with your mental model !! 'then' and only "then" is the best keyword in the situation which is on the table right now.

it totally fix the confusing "else" actual mess (for at least 2 reasons).

Python 4.0 ? My son will thank us !

NB: 
- I'm not a native English speaker
- but I'm using the "(for,while)/else" way sometimes, but damn the "then" keyword is at least better here !