struct.pack_into(), struct.unpack_from() don't document support for negative offsets

[pfalcon]

BPO	26899
Nosy	@pfalcon

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-05-01.10:09:35.601>
labels = ['docs']
title = "struct.pack_into(), struct.unpack_from() don't document support for negative offsets"
updated_at = <Date 2016-05-01.10:09:35.601>
user = 'https://github.com/pfalcon'

bugs.python.org fields:

activity = <Date 2016-05-01.10:09:35.601>
actor = 'pfalcon'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2016-05-01.10:09:35.601>
creator = 'pfalcon'
dependencies = []
files = []
hgrepos = []
issue_num = 26899
keywords = []
message_count = 1.0
messages = ['264590']
nosy_count = 2.0
nosy_names = ['pfalcon', 'docs@python']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue26899'
versions = ['Python 3.6']

Linked PRs

• gh-71086: Document negative offset support in struct.pack_into() and unpack_from() #153650

[pfalcon]

See
https://docs.python.org/3/library/struct.html#struct.pack_into
https://docs.python.org/3/library/struct.html#struct.unpack_from

Actual source contains code like:

if (offset < 0)
    offset += vbuf.len;

to allow specify offsets from the end of a buffer.