The repair_validations helper was not working correctly before because
it only cleared the validations that created :validate callbacks. This
didn't include the validates created by validates_with, so I've added a
method to clear all validations.
Merge pull request #9363 from wangjohn/fix_repair_validations

Fixed the repair_validations helper method.
remove unused payloads in blocks in caching instrumentation
fix sentence [ci skip]
Merge pull request #9811 from neerajdotname/fix-secret-token-sentence

fix sentence [ci skip]
Calling find() on an association with an inverse will now check to see
if the association already holds that record in memory before checking
the database for the specified ids.
Merge pull request #9807 from vipulnsward/remove_unused_payloads

remove unused payloads in blocks in caching instrumentation
Merge pull request #9529 from wangjohn/find_on_inverse_of_bugfix_9470

Find() on an association with an inverse will now scan existing in-memory records
Fix guides error on error class name

The error that's raised in case the required key is missing it's actually `ActionController::ParameterMissing` not `ActionController::MissingParameter`. It's important to fix so that people reading the guides knows what error to rescue from when needed.
Merge pull request #9816 from sebasoga/strong_parameters_guide_fix

Fix guides error on error class name
Remove mentions of "app" from http request docs [ci skip]