Allow user to copy the code snippet on single click.

I was using this app and I released that I tried selecting the text and then copy the selected text but none of the text was copied to the clipboard ?
Can we add a copy button in the right top corner so that the user can easily copy the code to the clipboard?

Thanks.

Locate the Flutter documentation screen that renders code snippets and first run the app to reproduce the clipboard issue. Add a copy control in the snippet's top-right corner, then verify that one click places the complete code snippet on the clipboard.

Written by the indexing model from the issue text.