feat: Change diagnostic symbols if vim.g.have_nerd_font is true

init.lua

@@ -588,6 +588,15 @@ require('lazy').setup({
         end,
       })
 
+      -- Change diagnostic symbols in the sign column (gutter)
+      if vim.g.have_nerd_font then
+        local signs = { Error = '', Warn = '', Hint = '', Info = '' }
+        for type, icon in pairs(signs) do
+          local hl = 'DiagnosticSign' .. type
+          vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })
+        end
+      end
+
       -- LSP servers and clients are able to communicate to each other what features they support.
       --  By default, Neovim doesn't support everything that is in the LSP specification.
       --  When you add nvim-cmp, luasnip, etc. Neovim now has *more* capabilities.