* lisp/progmodes/rust-ts-mode.el
(rust-ts-mode--font-lock-settings): Highlight closure parameters.
(macro_definition (identifier) @font-lock-preprocessor-face)
(field_declaration name: (field_identifier) @font-lock-property-face)
(parameter pattern: (_) @rust-ts-mode--fontify-pattern)
+ (closure_parameters (_) @rust-ts-mode--fontify-pattern)
(let_declaration pattern: (_) @rust-ts-mode--fontify-pattern)
(for_expression pattern: (_) @rust-ts-mode--fontify-pattern)
(let_condition pattern: (_) @rust-ts-mode--fontify-pattern)