Rollup of 5 pull requests Successful merges: - #116073 (Allow higher-ranked fn sigs in `ValuePairs`) - #116082 (Tweak expected message to explain what it's actually signifying) - #116086 (More accurate suggestion for `self.` and `Self::`) - #116104 (Reuse calculate_debuginfo_offset for fragments.) - #116106 (Migrate GUI colors test to original CSS color format) r? `@ghost` `@rustbot` modify labels: rollup