あやま訂正 ていせい符号 ふごうじゃなかったです
ayamariteiseifugōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 誤り訂正符号

1. Wasn't a correction mark.; Wasn't correcting errors.

Past/Perfective
Negative
Polite
Casual Register
Computing