That answer had about 25 spam suggestions rejected recently. The originators of those are already being blocked, automatically:
If you suggest an edit to a post that has a certain number of edits rejected as spam recently and then that edit is rejected as spam - we deal you a blocking penalty in the spam system.
-- Tim Post.
When rejecting spam edits repeatedly on the same answer gets tedious, a trick may be appropriate: edit the answer to expand it.
answers longer than a sentence get edits like that auto-rejected by the system, while still banning the associated IPs.
-- Shog9
It's not quite clear to me how many characters the answer needs to have in order for this to kick in: Shog9 said it's 400 some places, 200 others. Anyway, it's worth trying (by someone familiar with the subject): add another paragraph to the post, 1-2 sentences should be enough.