in lib/src/context.dart [1051:1068]
String prettyUri(uri) {
final typedUri = _parseUri(uri);
if (typedUri.scheme == 'file' && style == Style.url) {
return typedUri.toString();
} else if (typedUri.scheme != 'file' &&
typedUri.scheme != '' &&
style != Style.url) {
return typedUri.toString();
}
final path = normalize(fromUri(typedUri));
final rel = relative(path);
// Only return a relative path if it's actually shorter than the absolute
// path. This avoids ugly things like long "../" chains to get to the root
// and then go back down.
return split(rel).length > split(path).length ? path : rel;
}