Rollup of 8 pull requests
Successful merges:
- #104110 (prevent uninitialized access in black_box for zero-sized-types)
- #104117 (Mark `trait_upcasting` feature no longer incomplete.)
- #104144 (Suggest removing unnecessary `.` to use a floating point literal)
- #104250 (Migrate no result page link color to CSS variables)
- #104261 (More accurately report error when formal and expected signature types differ)
- #104263 (Add a reference to ilog2 in leading_zeros integer docs)
- #104308 (Remove the old `ValidAlign` name)
- #104319 (Fix non clickable source link)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
bors
cd128880b1