[issue16724] Rename `data` argument names to `bytes`

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

> When people use docs as a reference, they don't read top notes.
Maybe, but they can read some words beyond the function name, can't they?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16724>
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