[issue33852] doc Remove parentheses from sequence subscription description

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

This wording was introduced in 3a0ad6089bccf0b167fe8ebd2457fedec8f851a3.

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nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33852>
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