However, the edit was rejected by the post author on the grounds that it didn't improve the readability of the answer
The edit does not improve the quality of the post. Changes to the content are unnecessary or make the post more confusing.
Obviously, I disagree (hence my suggested edit).
I raised a moderator flag asking for the edit to be pushed through, but was told that this is not something that warrants moderator intervention, which seems reasonable. It was also suggested that I raise this on Meta, so here goes:
What does the community think about questions in answers? Should they be edited out? If so, and the author disagrees, what should be done in that case?