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.
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.