No need to specify empty bin list anymore(example)
Merge pull request #1273 from kyab/no_bins_example

No need to specify empty bin list anymore(example)
new is removed from Integer so doesn't need to be removed again in Fixnum
bob doesn't have new so don't undef
Raise a NameError when symbol isn't found.
Add undef var test
Improve undef tests
Improve alias tests
Improve ArgumentError tests
Add assert_not_equal
Improve Array tests
Fix Array Tests
Improve BasicObject tests
Improve Class tests
Improve Comparable tests
Add assert_not_include to test environment
Improve Enumerable tests
Improve Exception tests
Improve false tests
Singleton raises TypeError on #new