$ bundle gem aaa --ext

Creating gem 'aaa'...
MIT License enabled in config
      create  aaa/Gemfile
      create  aaa/.gitignore
      create  aaa/lib/aaa.rb
      create  aaa/lib/aaa/version.rb
      create  aaa/aaa.gemspec
      create  aaa/Rakefile
      create  aaa/README.md
      create  aaa/bin/console
      create  aaa/bin/setup
      create  aaa/LICENSE.txt
      create  aaa/.travis.yml
      create  aaa/.rspec
      create  aaa/spec/spec_helper.rb
      create  aaa/spec/aaa_spec.rb
      create  aaa/ext/aaa/extconf.rb
      create  aaa/ext/aaa/aaa.h
      create  aaa/ext/aaa/aaa.c

$ cd aaa
$ rspec

/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- aaa/aaa (LoadError)
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /home/loocash/Desktop/Projekt Zespołowy/aaa/lib/aaa.rb:2:in `<top (required)>'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /home/loocash/Desktop/Projekt Zespołowy/aaa/spec/spec_helper.rb:2:in `<top (required)>'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /home/loocash/Desktop/Projekt Zespołowy/aaa/spec/aaa_spec.rb:1:in `<top (required)>'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1327:in `load'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1327:in `block in load_spec_files'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1325:in `each'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1325:in `load_spec_files'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:102:in `setup'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:88:in `run'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:73:in `run'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:41:in `invoke'
	from /var/lib/gems/2.1.0/gems/rspec-core-3.3.2/exe/rspec:4:in `<top (required)>'
	from /usr/local/bin/rspec:23:in `load'
	from /usr/local/bin/rspec:23:in `<main>'