Add spell check

Internal/os_nvim_init.vim

@@ -63,7 +63,6 @@ lua <<EOF
       vim.o.makeprg      = "build.bat"
     end
   else
-    -- vim.api.nvim_set_keymap('t', '<Esc>', '<C-\\><C-n>', {noremap = true})
     vim.o.makeprg        = "./build.sh"
   end
   vim.api.nvim_set_keymap('n', '<C-b>', ':Make<CR>', {noremap = true})
@@ -199,6 +198,16 @@ lua <<EOF
     auto_install = false,
   }
 
+  -- Set spelling errors in a purple hint
+  vim.opt.spell = true
+  vim.api.nvim_create_autocmd("LspAttach", {
+    callback = function()
+      vim.cmd("highlight SpellBad gui=underline guifg=#d3869b")
+      -- Highlight uncapitalised sentences
+      -- vim.cmd("highlight SpellCap gui=underline guifg=Blue")
+    end,
+  })
+
   -- Treesitter ////////////////////////////////////////////////////////////////////////////////////
   -- TODO: 2022-06-19 Treesitter is too slow on large C++ files
   -- require('nvim-treesitter.configs').setup {
@@ -227,7 +236,7 @@ lua <<EOF
   -- Automatically load project file on buffer enter
   vim.api.nvim_create_autocmd({"BufEnter"}, {
     callback = function(ev)
-      local project_file = vim.fn.expand('%:p:h') .. '/project_nvim.lua'
+      local project_file = vim.fn.getcwd() .. '/project_nvim.lua'
       if vim.fn.filereadable(project_file) == 1 then
           vim.cmd('luafile ' .. vim.fn.fnameescape(project_file))
       end