Emendation /(?)/

Em·en·da·tion

Emendation

n.
  1. The act of altering for the better, or correcting what is erroneous or faulty; correction; improvement.
  2. Alteration by editorial criticism, as of a text so as to give a better reading; removal of errors or corruptions from a document; as, the book might be improved by judicious emendations.