@ -53,7 +53,7 @@ class PreserveLineStyleOnMergeRule extends DeleteRule {
op = itr.next();
String text = op.data is String ? op.data as String : '';
int lineBreak = text.indexOf('\n');
if (lineBreak < 0) {
if (lineBreak == -1) {
delta..retain(op.length);
continue;
}
@ -68,6 +68,7 @@ class PreserveLineStyleOnMergeRule extends DeleteRule {
attributes.addAll(attrs);
delta..retain(lineBreak)..retain(1, attributes);
break;
return delta;