* require, require_relative, load by double quotes

We're getting rid of all single quote usage, unless it serves a specific purpose, as per the general style guide.

This reverts commit 3420a145, reversing
changes made to afb66a5a.

Style/SpaceBeforeBlockBraces
Style/SpaceInsideBlockBraces
Style/SpaceInsideHashLiteralBraces

Fix all violations in the repository.

The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.

assert_file already gives this functionality for free by passing
multiple contents.

Added generated unit test for generator generator and new test:generators rake task included in test:all rake task.

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

Load generators from both lib/rails/generators and lib/generators. Using the former since it's less obstrusive.

Generators load path now will be Ruby load path. If you want to use rspec:install generator, you need generators/rspec/install_generator in your load path.

This reverts commit a288b74f.

Signed-off-by: NYehuda Katz <wycats@gmail.com>