Don't pass args to vim.lsp.buf.format/formatting

Args passed by nvim_buf_create_user_command to the callback creates
errors with rust-analyzer on nvim 0.7.x and vim.lsp.buf.formatting.

init.lua

@@ -289,7 +289,13 @@ local on_attach = function(_, bufnr)
   end, '[W]orkspace [L]ist Folders')
 
   -- Create a command `:Format` local to the LSP buffer
-  vim.api.nvim_buf_create_user_command(bufnr, 'Format', vim.lsp.buf.format or vim.lsp.buf.formatting, { desc = 'Format current buffer with LSP' })
+  vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
+    if vim.lsp.buf.format then
+      vim.lsp.buf.format()
+    elseif vim.lsp.buf.formatting then
+      vim.lsp.buf.formatting()
+    end
+  end, { desc = 'Format current buffer with LSP' })
 end
 
 -- nvim-cmp supports additional completion capabilities