[Python-ideas] Briefer string format

[Guido van Rossum]

Perhaps surprisingly, I find myself leaning in favor of the f'...{var}...'
form. It is explicit in the variable name.

Historically, the `x` notation as an alias for repr(x) was meant to play
this role -- you'd write '...' + `var` + '...', but it wasn't brief enough,
and the `` are hard to see. f'...' is more explicit, and can be combined
with r'...' and b'...' (or both) as needed.

-- 
--Guido van Rossum (python.org/~guido)
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