Fix some "make doc" warnings and update some doc tests
Fix compound assignment to require proper L-value.

Allows for catching more invalid assignments at parse-time instead of
aborting at runtime after realizing an assignment won't work.

Addresses BIT-1295.
Make using local IDs in @if directives an error.

Addresses BIT-1296.
Merge remote-tracking branch 'origin/fastpath'

* origin/fastpath:
  Fix some "make doc" warnings and update some doc tests
Merge remote-tracking branch 'origin/topic/jsiwek/bit-1296'

* origin/topic/jsiwek/bit-1296:
  Make using local IDs in @if directives an error.

BIT-1296 #merged
Merge remote-tracking branch 'origin/topic/jsiwek/bit-1295'

* origin/topic/jsiwek/bit-1295:
  Fix compound assignment to require proper L-value.

BIT-1295 #merged
Updating doc baselines.