Rollup of 11 pull requests

[RalfJung]

Successful merges:

• Rephrase docs in for ptr #66379 (Rephrase docs in for ptr)
• Draw vertical lines correctly in compiler error messages #66589 (Draw vertical lines correctly in compiler error messages)
• Allow customising ty::TraitRef's printing behavior #66613 (Allow customising ty::TraitRef's printing behavior)
• Panic machinery comments and tweaks #66766 (Panic machinery comments and tweaks)
• Handle GlobalCtxt directly from librustc_interface query system #66791 (Handle GlobalCtxt directly from librustc_interface query system)
• Record temporary static references in generator witnesses #66793 (Record temporary static references in generator witnesses)
• Cleanup error code #66808 (Cleanup error code)
• Clarifies how to tag users for assigning PRs #66826 (Clarifies how to tag users for assigning PRs)
• Clarify {f32,f64}::EPSILON docs #66837 (Clarify {f32,f64}::EPSILON docs)
• Miri: do not consider memory allocated by caller_location leaked #66844 (Miri: do not consider memory allocated by caller_location leaked)
• Minor documentation fix #66872 (Minor documentation fix)

Failed merges:

r? @ghost