[ActiveJob] Autoload adapters
Keep the first string we fetch

Otherwise, it's possible for GC to run in between, and fail the test.
Merge pull request #16613 from splattael/master

Speed up JRuby tests by improving the startup time
[ci skip] use NOTE instead of Note
[ci skip] proper end to sentence
[ci skip] docs grammar
Merge pull request #16700 from seuros/autoload

[ActiveJob] Autoload adapters
use self instead of #read_attribute
[ci skip] Updated documentation syntax of block parameter for rdoc
Merge pull request #16703 from tomkadwill/documented_any_block_param

[ci skip] Updated documentation syntax of block parameter for rdoc
[ci skip] Updated documentation syntax of block parameter for rdoc
[ci skip] Updated include to reference record parameter for rdoc
Merge pull request #16706 from tomkadwill/documented_include_record_param

[ci skip] Updated include to reference record parameter for rdoc
Merge pull request #16705 from tomkadwill/documented_many_block_param

[ci skip] Updated documentation syntax of block parameter for rdoc
Adjusted punctuation and grammar for Form Helpers guide [ci skip]
Merge pull request #16708 from zzak/bcjordan-patch-1

Adjusted punctuation and grammar for Form Helpers guide [ci skip]
[ci skip] Updated documentation syntax of other parameter for rdoc
Merge pull request #16713 from tomkadwill/documented_eqls_other_param

[ci skip] Updated documentation syntax of other parameter for rdoc
[ci skip] Modify a web-console PR link
Merge pull request #16715 from y-yagi/update_4_2_release_notes

[ci skip] Modify a web-console PR link for release noted