add autocmd to highlight trailing whitespace

init.lua

@@ -254,11 +254,16 @@ mason_lspconfig.setup_handlers {
 -- Turn on lsp status information
 require('fidget').setup()
 
--- vim.g.coq_settings = {
---   auto_start = true,
--- }
---
--- vim.cmd([[COQnow -s]])
+-- highlight trailing whitespace
+vim.cmd([[
+  autocmd VimEnter * autocmd WinEnter * let w:created=1
+  autocmd VimEnter * let w:created=1
+  highlight WhitespaceEOL ctermbg=red ctermfg=white guibg=#592929
+  autocmd BufWritePost *
+    \ if !exists('w:created') | call matchadd('WhitespaceEOL', '\s\+$') | endif
+  call matchadd('WhitespaceEOL', '\s\+$')
+]])
+
 
 local hop = require('hop')
 local directions = require('hop.hint').HintDirection