Further refactoring of Rake task pages

Also fixes links to renamed sections and enforces correct capitalization
of RSpec and YAML.
6 jobs for !30010 with eread/refactor-more-rake-task-topics in 7 minutes and 8 seconds (queued for 1 second)
latest detached
Status Job ID Name Coverage
  Sync
manual #519707357
gitlab-org allowed to fail manual
dont-interrupt-me
 
  Test
passed #519707363
gitlab-org
danger-review

00:05:33

passed #519707360
gitlab-org
docs lint

00:07:08

passed #519707366
gitlab-org
lint-ci-gitlab

00:01:15

 
  Review
manual #519707368
gitlab-org allowed to fail manual
review-docs-cleanup
manual #519707367
gitlab-org allowed to fail manual
review-docs-deploy