Auto merge of #118473 - matthiaskrgr:rollup-q96bm3u, r=matthiaskrgr

Rollup of 5 pull requests

Successful merges:

 - #118452 (rustdoc-search: allow spaces around `::` in path query)
 - #118453 (Tweak message on ADT with private fields building)
 - #118456 (rustc_span: Remove unused symbols.)
 - #118458 (rustdoc: remove small from  `small-section-header`)
 - #118464 (Dispose llvm::TargetMachines prior to llvm::Context being disposed)

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

Author: bors