The dictionary meaning of the word Augment is to make (something) greater by adding to it. Is the scope of the word restricted to just quantity or does it extend to quality as well?
For example: 'Her secretarial work helped to augment her husband's income' refers specifically to an increase in quantity.
But can the word be used like: 'He augmented the code by including XYZ compatibility' to mean an increase in quantity as well as quality?
Also, is there a better word that can be used to mean an increase in both quantity and quality?