Removed incorrect warning from application.js templates and replaced it with stub command description
Merge pull request #10626 from firedev/master

Removed incorrect warning from application.js templates and replaced it with stub command description
Rewrite `activerecord/RUNNING_UNIT_TESTS`

`RUNNING_UNIT_TESTS` is written in an unclear and confusing manner. This commit
attempts to correct that.

Thanks to zzak and vipulnsward for feedback.
Fix HWIA#to_hash behavior with array of hashes.
Merge pull request #10601 from Ichimonji10/fix-docs

Rewrite  `activerecord/RUNNING_UNIT_TESTS.rdoc`
Merge pull request #10631 from kennyj/improve_10266

Fix HWIA#to_hash behavior with array of hashes.
use unless instead of if!
simplify the condions lambda generation
conditions are guaranteed to be arrays by initialize
stop keeping a reference to the options hash
remove deprecation notices
remove dead code