in lib/src/usage.dart [145:170]
List<int> _calculateColumnWidths() {
var abbr = 0;
var title = 0;
for (var option in _optionsAndSeparators) {
if (option is! Option) continue;
if (option.hide) continue;
// Make room in the first column if there are abbreviations.
abbr = math.max(abbr, _abbreviation(option).length);
// Make room for the option.
title = math.max(
title, _longOption(option).length + _mandatoryOption(option).length);
// Make room for the allowed help.
if (option.allowedHelp != null) {
for (var allowed in option.allowedHelp!.keys) {
title = math.max(title, _allowedTitle(option, allowed).length);
}
}
}
// Leave a gutter between the columns.
title += 4;
return [abbr, title];
}