Changesets for individual files should be noindex'd

[jonoaldersonwp]

Individual file changes/diffs within a changeset should have a meta robots value of noindex, follow.

E.g., ​https://core.trac.wordpress.org/changeset/37680/trunk/src/wp-admin/index.php

[dd32]

Is noindex better than a canonical link to the changeset here?

[dd32]

In 8226:

Trac: Add a noindex, follow robots header to file revisions and file-based changeset views.

Fixes #4168, #4169.

[jonoaldersonwp]

Yeah, canonical wouldn't work here; it's not an equivalent page, and wouldn't necessarily keep it out of the index.