Rollup of 10 pull requests

[sanxiyn]

Successful merges:

• Document the -Z flag to the rustc book #59680 (Document the -Z flag to the rustc book)
• remove lookup_char_pos_adj #59735 (remove lookup_char_pos_adj)
• Uplift get_def_path from Clippy #59779 (Uplift get_def_path from Clippy)
• compiletest: Improve no_prefer_dynamic docs #59806 (compiletest: Improve no_prefer_dynamic docs)
• Kill dead code dominator code. #59811 (Kill dead code dominator code.)
• Fix broken links on std::boxed doc page #59814 (Fix broken links on std::boxed doc page)
• Fix links on keyword docs. #59830 (Fix links on keyword docs.)
• Remove strange formatting in Ordering docs. #59831 (Remove strange formatting in Ordering docs.)
• Re-export NonZero signed variant in std #59835 (Re-export NonZero signed variant in std)
• std::ops::Div examples: correct nominator to numerator #59836 (std::ops::Div examples: correct nominator to numerator)

Failed merges:

r? @ghost