Commits since last release

Check upstream for the full history.

• Add 1+ 1- integer range propagation support commit
• Add sum/subtraction integer range propagation support commit
• Add comp-cstr-greatest-in-range comp-cstr-smallest-in-range commit
• Don't require trailing backslashes in `comp-eln-load-path' (bug#45462) commit
• Fix recent shortdoc.el and fns.c additions commit
• Fix up length_internal with degenerate length inputs commit
• Improve "find definition" in Help buffers commit
• Add new predicates for sequence lengths commit