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
No need to specify empty bin list anymore(example)
Check parameters strictly.

calloc in C99 is expected to return NULL when nelem * len == 0.
Merge pull request #1278 from monaka/pr-calloc-improvement

Check parameters strictly.
Merge pull request #1281 from Bovi-Li/singleton

Singleton raises TypeError on #new
fix indent
Merge remote-tracking branch 'upstream/master'