Duplicate id errors in generated HTML for WebIDL using partial namespace

[danielpeintner]

Description of problem

The Scripting API document uses partial namespace WebIDL definitions in

• https://w3c.github.io/wot-scripting-api/#the-consume-method
• https://w3c.github.io/wot-scripting-api/#the-produce-method
• https://w3c.github.io/wot-scripting-api/#the-discover-method
• ...

Once we generate HTML out of the note via "ReSpec" -> "Export" -> "HTML" we get an HTML with errors (duplicate ID errors)
see w3c/wot-scripting-api#477 (comment)

How can we fix this problem?