Improve comment indenting in 'lua-ts-mode'

* lisp/progmodes/lua-ts-mode.el (lua-ts--simple-indent-rules):
Align single line comments with the surrounding context.
(lua-ts--comment-first-sibling-matcher): Check that comment is
the first sibling.
(lua-ts--multi-line-comment-start): New function.
* test/lisp/progmodes/lua-ts-mode-resources/indent.erts:
Add tests.  (Bug#74298)

1 files changed, 42 insertions, 0 deletions

diff --git a/test/lisp/progmodes/lua-ts-mode-resources/indent.erts b/test/lisp/progmodes/lua-ts-mode-resources/indent.erts
index ba7bad1b452..b0ece4cc261 100644
--- a/test/lisp/progmodes/lua-ts-mode-resources/indent.erts
+++ b/test/lisp/progmodes/lua-ts-mode-resources/indent.erts
@@ -360,6 +360,10 @@ multi-line
     ]]
   return true
 end
+
+  --[[
+Long comment.
+    ]]
 =-=
 --[[
       Multi-line
@@ -373,6 +377,44 @@ multi-line
     ]]
   return true
 end
+
+  --[[
+Long comment.
+    ]]
+=-=-=
+
+Name: Comment Indent
+
+=-=
+local fn1 = function (a, b)
+-- comment
+return a + b
+end
+
+local tb1 = {
+  first = 1,
+-- comment
+  second = 2,
+}
+
+local tb9 = { one = 1,
+-- comment
+   two = 2 }
+=-=
+local fn1 = function (a, b)
+  -- comment
+  return a + b
+end
+
+local tb1 = {
+  first = 1,
+  -- comment
+  second = 2,
+}
+
+local tb9 = { one = 1,
+              -- comment
+              two = 2 }
 =-=-=
 
 Name: Argument Indent