Remove duplicated word in rails_helper's comment

Author: opsidao

lib/generators/rspec/install/templates/spec/rails_helper.rb

@@ -9,7 +9,7 @@
 # run as spec files by default. This means that files in spec/support that end
 # in _spec.rb will both be required and run as specs, causing the specs to be
 # run twice. It is recommended that you do not name files matching this glob to
-# end with _spec.rb. You can configure this pattern with with the --pattern
+# end with _spec.rb. You can configure this pattern with the --pattern
 # option on the command line or in ~/.rspec, .rspec or `.rspec-local`.
 Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }