Describe the bug
When I attempt to autocomplete the generated symbols from package:charcode that start with a $ character, the autocompleted symbol ends up with $$.

To Reproduce

1. Add import 'package:charcode/charcode.dart'; to some .dart file.
2. Start typing $ba. The autocomplete list appears, listing $backquote, $backslash, ...
3. Press Tab.

$ba gets autocompleted to $$backquote.

Expected behavior
$ba should have been autocompleted to $backquote.

Other notes
Strangely, if I define my own variable (e.g. var $foo = 'bar';), then that seems to autocomplete fine. I'm not sure why the symbols from package:charcode are autocompleting differently.

Versions

• Operating System and version: Ubuntu 20.04.4 LTS (x64)
• VS Code version: 1.66.2
• Dart extension version: 3.38.2
• Dart/Flutter SDK version: Dart 2.16.2