[issue5237] Allow auto-numbered replacement fields in str.format() strings

[David W. Lambert]

David W. Lambert <lambertdw at corning.com> added the comment:

I am net yet fluent in format method.  I meant

":" where "#" appeared.

Anyway, I think you need the colon. 
 
If from
print('{0:9}'.format(33))

you make the argument number implicit and remove the colon you'd get

print('{9}'.format(33))

which does and should raise IndexError.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5237>
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