rename sub_ptr to offset_from_unsigned

[bend-n]

i also made byte_sub_ptr byte_offset_from_unsigned

fixes #137121
tracking issue #95892

[rustbot]

r? @workingjubilee

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[rustbot]

The Miri subtree was changed

cc @rust-lang/miri

[rustbot]

Could not assign reviewer from: Noratrieb.
User(s) Noratrieb are either the PR author, already assigned, or on vacation. Please use r? to specify someone else to assign.

[RalfJung]

I guess this will also be a test whether GH and all our tooling can deal with an emoji branch name. There have been problems in the past.^^

[Noratrieb]

yeahh, please add at least one ascii character to the branch name, or it will end badly probably

[RalfJung]

The branches a PR is on can't be changed, so that would require a new PR. But we can also just try?^^ So far it seems to work.

[Noratrieb]

let's see if this fails horribly due to the branch name ^^'. thanks for the PR!
@bors r+ rollup

[bors]

📌 Commit c813d8f has been approved by Noratrieb

It is now in the queue for this repository.