False positive: in addition to <adjective> inside of parenthetical or nonrestrictive clause

[dormieriancitizen]

What got flagged?

This builds themes of spiritual (in addition to personal) failure
This builds themes of spiritual, in addition to personal, failure

"To" was flagged and suggested to be replaced with "too".

When the clause does not end after the adjective, the linter correctly picks up on the fact that the to is not meant to be a too, but when it does (as in a parenthetical or nonrestrictive comma clauses), it incorrectly suggests replacing the to.

Why is this incorrect?
Just reading it, this is not correct:
"this builds themes of spiritual, in addition too personal, failure"

Example of correct usage:
No correction should be offered here.

[hippietrail]

I've been thinking about a general fix for the class of problems of which this is a member. Checking whether the first word is the last word of a known idiom or compound, or whether the last word is the first word of one.

Then the linter which corrects "to" to "too" would be be able to check if "to" in this case is part of something bigger and not go ahead with the lint.

I'm not sure the best way to implement that though.