Current Main Navigation Not Highlighted

[yatil]

Expected behavior:

1. Go to https://www.w3.org/WAI/planning/statements/minimal-example/
2. At the main navigation:

• The current main navigation item (Planning & Policies) should have aria-current set to location
• The current main navigation item (Planning & Policies) should be highlighted (which is triggered by aria-current="location")

Current behavior:

aria-current="location" is not set.

(Edit to change aria-current="true" to aria-current="location". The editors regret the error.)