Originally raised at Dart-Code/Dart-Code#1223 by @rajeshzmoke. If you print() a long string in Flutter, it gets truncated with <…> in the flutter run output:
void main() {
print('a' * 100 + 'b' * 100 + 'c' * 100 + 'd' * 100 + 'e' * 100 + 'f' * 100 +
'g' * 100 + 'h' * 100 + 'i' * 100 + 'j' * 100 + 'k' * 100);
runApp(const GalleryApp());
}

I'm using the iOS Simulator - it's possible this is a limitation of how we're reading the logs from the device, I'm not sure.