
When promisifying async operations in commit 764527c8c
, the
finish function for read_line_async() was sneakily changed from
read_line_finish_utf8() to read_line_finish().
That is, the call returns a Uint8Array now that requires an
explicit conversion to string.
https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1407