Use zero-padding for number_to_rounded_converter
Merge pull request #16650 from zzak/fix-precision-number_to_rounded_converter

Use zero-padding for number_to_rounded_converter
Properly referencing AR::RecordNotFound in AJ guide rescuing example
Merge pull request #16655 from brocktimus/20140823_doco_change

Correct AR::RecordNotFound in AJ guide rescue example [ci skip]
Fix example code in Active Job guide [ci skip]
Merge pull request #16659 from y-yagi/patch-4

Fix example code in Active Job guide [ci skip]