False positive: "how" wrongly flagged to require following "to"

**What got flagged?**

> since this is how fully-connected neural networks are modeled.

**Why is this incorrect?**

This sentence is about "how x works". I'm not sure what the heuristic might be doing... Just checking for a following adverb in the expectation that the word after that would be a verb in the infinitive perhaps?

Start by reproducing the quoted sentence in Harper and identify the heuristic that flags “how” as requiring “to”; the issue does not name a file or test. Done means this sentence is no longer flagged while the intended “how … to” detection continues to work, with a regression test for the reported wording.

Written by the indexing model from the issue text.