Fontify all comment delimiters in 'lua-ts-mode'

* lisp/progmodes/lua-ts-mode.el (lua-ts--comment-font-lock):
Apply 'font-lock-comment-delimiter-face' to the entire span of
initial dashes.  In particular, this improves the appearance of
LuaCATS and EmmyLua style annotations which use "---".
* test/lisp/progmodes/lua-ts-mode-resources/font-lock.lua:
Add tests.  (Bug#79258)

1 files changed, 5 insertions, 0 deletions

diff --git a/test/lisp/progmodes/lua-ts-mode-resources/font-lock.lua b/test/lisp/progmodes/lua-ts-mode-resources/font-lock.lua
index 93d589e3825..5a36bcad10b 100644
--- a/test/lisp/progmodes/lua-ts-mode-resources/font-lock.lua
+++ b/test/lisp/progmodes/lua-ts-mode-resources/font-lock.lua
@@ -11,6 +11,11 @@ Multi-line comment
 -- <- font-lock-comment-face
 local line_comment = "comment" -- comment
 --                                ^ font-lock-comment-face
+---@alias MyNumber integer
+-- <- font-lock-comment-delimiter-face
+------Calculate new number
+-- ^ font-lock-comment-delimiter-face
+function calc() end
 
 -- Definition
 local function f1() end