nixpkgs/neovim: disable solargraph formatting

.config/nixpkgs/neovim/lsp.lua

@@ -101,6 +101,9 @@ end
 if vim.fn.executable("solargraph") == 1 then
   nvim_lsp.solargraph.setup({
     on_attach = on_attach,
+    init_options = {
+      formatting = false,
+    }
   })
 end