On 13 Jul 2014 18:39, "Marc-Andre Lemburg" <report@bugs.python.org> wrote:
>
>
> Marc-Andre Lemburg added the comment:
>
> Why are you removing guarantees like these from the str docs:
>
> "The original string is returned if *width* is less than or equal to
``len(s)``."

Because it's untrue for bytearray, and possible object reuse is a general
characteristic of immutability for str and bytes. If another implementation
makes a copy for some reason, it would still be considered "Python".

Since the sentence thus conveys no useful information, I removed it from
both the text and binary variants rather than coming up with appropriate
wording to indicate that the behaviour of returning a new reference to the
existing object when no content changes are needed doesn't apply to the
mutable bytearray.

>
> ?
>
> This doesn't seem to have anything to do with documenting bytes and
bytearrays.
>
> ----------
> nosy: +lemburg
>
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> <http://bugs.python.org/issue21777>
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