Update

ftplugin/mlir.vim

@@ -0,0 +1,16 @@
+if polyglot#init#is_disabled(expand('<sfile>:p'), 'llvm', 'ftplugin/mlir.vim')
+  finish
+endif
+
+" Vim filetype plugin file
+" Language: MLIR Assembly
+" Maintainer: The MLIR team
+
+if exists("b:did_ftplugin")
+  finish
+endif
+let b:did_ftplugin = 1
+
+setlocal softtabstop=2 shiftwidth=2
+setlocal expandtab
+setlocal comments+=://