Fixed build error 'WARNING: unknown document: annotations/routing#activation'
merged branch WouterJ/fix_build_error (PR #212)

This PR was merged into the 2.1 branch.

Discussion
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Fixed build error 'WARNING: unknown document: annotations/routing#activation'

this should also get merged into 2.2 and master

Commits
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9c3bbb9 Fixed build error 'WARNING: unknown document: annotations/routing#activation'