Auto merge of #115900 - matthiaskrgr:rollup-3ba15da, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - #115247 (Document std limitations before/after main)
 - #115329 (fix std::primitive doc: homogenous -> homogeneous)
 - #115487 (Improve documentation on when signes are printed by default)
 - #115560 (Update doc for `alloc::format!` and `core::concat!`)
 - #115836 (update rust_analyzer_settings.json)
 - #115884 (make ty::Const debug printing less verbose)
 - #115890 (Migrate GUI colors test to original CSS color format)
 - #115895 (Improve Vec(Deque)::truncate documentation)

r? `@ghost`
`@rustbot` modify labels: rollup