An answer to previous questions on link rots indicated that they are best fixed by user edits. Such edits are limited to a minimum of 6 characters, which is sometimes not the case with link rots. So how should they be fixed?
Is the rest of the post so perfect that you cannot find six characters of edit?
In most cases, most people could use the link rot as a trigger for an edit and then improve the rest of the post a little.
I suspect there are many link-rotted posts that could also do with tidying up, even if only removal of "Thanks in advance" or similar.