Auto merge of #59967 - Centril:rollup-bdqq7ux, r=Centril

Rollup of 7 pull requests

Successful merges:

 - #59856 (update polonius-engine)
 - #59877 (HirIdify hir::Def)
 - #59896 (Remove duplicated redundant spans)
 - #59900 (Remove [mut] syntax in pin docs)
 - #59906 (Make BufWriter use get_mut instead of manipulating inner in Write implementation)
 - #59936 (Fix cross-crate visibility of fictive variant constructors)
 - #59957 (Add missing backtick to Symbol documentation.)

Failed merges:

r? @ghost