Use the three-argument form of JSON.stringify() to dump the settings object line-wrapped and with 1-space indents, for readability when pasted into bug reports (or anywhere else).

For example, in my recently-opened issue, instead of this:

Settings

{"details-list":"['conditionText', 'windSpeedAndDir', 'sunrise', 'humidity', 'feelsLike', 'gusts', 'sunset', 'precipitation']","theme":"''","show-suntime":"false","secondary-panel-detail":"''","is-activated":"true","panel-priority":"0","panel-box":"'center'","panel-offset":"20.0","main-location-index":"0","my-loc-provider":"'disable'","unit-preset":"'us'","app-version":"49.2.0","gnome-version":"49.2","user-locale":"en-US"}

the pasted dump would look like this:

Settings

{
 "details-list": "['conditionText', 'windSpeedAndDir', 'sunrise', 'humidity', 'feelsLike', 'gusts', 'sunset', 'precipitation']",
 "theme": "''",
 "show-suntime": "false",
 "secondary-panel-detail": "''",
 "is-activated": "true",
 "panel-priority": "0",
 "panel-box": "'center'",
 "panel-offset": "20.0",
 "main-location-index": "0",
 "my-loc-provider": "'disable'",
 "unit-preset": "'us'",
 "app-version": "49.2.0",
 "gnome-version": "49.2",
 "user-locale": "en-US"
}

(I don't love that the entire details-list is still dumped onto a single line, but that's a consequence of the Record<string, string> type of the temporary object, and the value of details-list (an (as)-format GVariant) having already been dumped to string form using GVariant::print().)