allow to test AR master against AR-JDBC master (with `ENV['AR_JDBC']`)
`export AR_JDBC=true` on travis-ci as a *before_install* (but on jruby only)
adding a test for --help defaults
add a comment to people of the future
pass argv to each method that mutates it
return argv from each method
return argv from more methods
return argv from the insert method
there is no reason for ARGV[0] to be nil
functionally build the argv
no need to shift
no need to dup, argv is never mutated
avoid object creation if there is no rc file
add a test for whitespace separated args in the rc file
golf down rc file reading
We need to fix Sam Ruby's tests.

Revert "always call set_default_accessors from create_root"

This reverts commit faa1b82bf2ae5d33bfa1ee5552878d5ca69607b0.
show javascripts can be disabled in generators
Merge pull request #12706 from RobZolkos/master

show javascripts can be disabled in scaffold generator
[ci skip] Make all tables have Controller#Action, change a tense in sentence.
Require bigdecimal before monkey-patching it

If we try to monkey-patch the class before requiring it, then a
"superclass mismatch" (TypeError) error is raised and the build can't
run correctly.

Fixes #12708