Add notes about database connection pool [ci skip]
add test_scoped_root_as_name

test for regression introduced by https://github.com/rails/rails/pull/9155
Merge pull request #12337 from rubys/route-formatter-test

add test_scoped_root_as_name
Use join to concat the both side of the AST

Onf of the sides can be nil and it will raise a Conversion error
No need the else clause
Merge pull request #10822 from gaurish/pool

Add note about database connection pool in postgres template