Fix internal link

The linked section is:

And thus the link should end with "_id" and not "_key".

Change-Id: I13d0b21e4223dc2bb484ee2d6f2cd81d74eb36ee
Fix invalid xml

Noticed by checksyntax test

Change-Id: I38a715f95ee9f477e03db50540ab5105220992d6
Fix whitespace

Fix issues found by checknicess check

Change-Id: I8b47bfea1c4e35930beab96f5db2e29a98d7c0c6
Merge "Fix whitespace"
Merge "Fix internal link"