Previously, many of the snippets would fail when something wasn’t
documented. This worked well when writing exhaustive API documentation,
but was cumbersome when trying to document a scenario that might only
being interested in a subset of the links, response fields, etc. It was
necessary to mark things that were not of interest as being ignored.
This commit introduces a relaxed variant of several snippets. A relaxed
snippet will not fail if something has not been documented. Instead,
the undocumented thing will be ignored. If something has been documented
but it does not exist a failure will still occur.
Closes gh-175
043e796502