[docs] [issue8556] Confusing string formatting examples

[Éric Araujo]

Éric Araujo <merwok at netwok.org> added the comment:

Thanks for the suggestion. Two things:
1. Please provide a unified diff, as explained in http://www.python.org/dev/
2. I think “number” would be a better placeholder.

Regards

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nosy: +merwok

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