vim-patch:9.1.0998: filetype: TI assembly files are not recognized (#31929)

Problem:  filetype: TI assembly files are not recognized
Solution: inspect '*.sa' and assembly files and detect TI assembly
          files, include filetype plugin and syntax script for TI
          assembly files (Wu, Zhenyu)

closes: vim/vim#15827

4f73c07abf

Co-authored-by: Wu, Zhenyu <wuzhenyu@ustc.edu>

runtime/lua/vim/filetype.lua

@@ -1064,11 +1064,11 @@ local extension = {
   builder = 'ruby',
   rake = 'ruby',
   rs = 'rust',
+  sa = detect.sa,
   sage = 'sage',
   sls = 'salt',
   sas = 'sas',
   sass = 'sass',
-  sa = 'sather',
   sbt = 'sbt',
   scala = 'scala',
   ss = 'scheme',

runtime/lua/vim/filetype/detect.lua

@@ -34,6 +34,12 @@ local matchregex = vim.filetype._matchregex
 -- can be detected from the first five lines of the file.
 --- @type vim.filetype.mapfn
 function M.asm(path, bufnr)
+  -- tiasm uses `* commment`
+  local lines = table.concat(getlines(bufnr, 1, 10), '\n')
+  if findany(lines, { '^%*', '\n%*', 'Texas Instruments Incorporated' }) then
+    return 'tiasm'
+  end
+
   local syntax = vim.b[bufnr].asmsyntax
   if not syntax or syntax == '' then
     syntax = M.asm_syntax(path, bufnr)
@@ -1424,6 +1430,15 @@ function M.sig(_, bufnr)
   end
 end
 
+--- @type vim.filetype.mapfn
+function M.sa(_, bufnr)
+  local lines = table.concat(getlines(bufnr, 1, 4), '\n')
+  if findany(lines, { '^;', '\n;' }) then
+    return 'tiasm'
+  end
+  return 'sather'
+end
+
 -- This function checks the first 25 lines of file extension "sc" to resolve
 -- detection between scala and SuperCollider
 --- @type vim.filetype.mapfn