[Change]: [1.99.0] Stabilize '#[my_macro] mod foo;'

[PLeVasseur]

Summary

Document how attribute and derive macros receive outline module declarations without loading the module files.

Refs #726

Reference alignment

Rust #157857 and Reference #2310. Derive coverage also follows the stabilization tests.

[PLeVasseur]

@tshepang -- would you also like to take a look, before this merges?

[tshepang]

• that it is the sole function parameter is stated in a preceding rule
• specify that the outline module is part of the macro input (but am not sure if it is clear enough)
• second sentence feels redundant

Suggested change

	The :t:`token` stream captured by the sole :t:`function parameter` of the :t:`macro implementation function` of a :t:`derive macro` excludes the contents of the :t:`source file` of any :t:`outline module`. The :t:`[source file]s` of such :t:`[outline module]s` are not loaded to produce this :t:`token` stream.
	The :t:`token` stream captured by the :t:`function parameter` of the :t:`macro implementation function` of a :t:`derive macro` excludes the contents of the :t:`source file` of any :t:`outline module` in the input.

View changes since the review

[tshepang]

• added "input" for clarification
• second sentence feels redundant

Suggested change

	The :t:`token` stream captured by the second :t:`function parameter` of the :t:`macro implementation function` of an :t:`attribute macro` excludes the contents of the :t:`source file` of any :t:`outline module`. The :t:`[source file]s` of such :t:`[outline module]s` are not loaded to produce this :t:`token` stream.
	The :t:`token` stream captured by the second :t:`function parameter` of the :t:`macro implementation function` of an :t:`attribute macro` excludes the contents of the :t:`source file` of any :t:`outline module` in the input.

View changes since the review