Problem: Run `ant check-links-dxp` from `liferay-docs/user` and good links are reported as bad:
Use this branch to limit the number of bad links and articles that need to be looped through
The execute method calls the `addDXPOnlyArticles` method and correctly
populates `currentArticles` with both the `articles` and `articles-dxp` articles
Processing returns to the `execute` method after `addDxpOnlyArticles` is called, and then calls `assignedReferenceDirArticles`: processing returns to `addDxpOnlyArticles` and this time the path is inexplicably set to `developer/appdev`
Debugging in `assignedReferenceDirArticles` shows that this check
returns false because `articleDir` is holding the value `developer/appdev`:
Expected: `articleDirs` holds `user`, and the check for `assignReferencedDirs` returns `true` when checking whether it's equal to `userGuideDir`.