* lisp/progmodes/rust-ts-mode.el
(rust-ts-mode--fontify-number-literal): Perform the improved
fontification of numbers. (Bug#73877)
* test/lisp/progmodes/rust-ts-mode-tests.el:
* test/lisp/progmodes/rust-ts-mode-resources/font-lock.rs:
* test/lisp/progmodes/rust-ts-mode-resources/font-lock-number.rs:
Add tests for the new optional fontification of the possible type
suffix of numbers.
* test/lisp/progmodes/rust-ts-mode-tests.el: New file for rust-ts-mode
tests.
* test/lisp/progmodes/rust-ts-mode-resources/font-lock.rs: New file
with rust-ts-mode font-locking tests. New tests added for macro
font-locking (bug#70464) and function signatures
(bug#70465).