Improvement on the default python test template

Hello, again!

The previous pull request #28 added an initial working of python support feature,
and this one addes some improvements on the default test code.

Changes summarized:

* Improve equal operator (to handle tuple/list types, as well as real-valued numbers)
* Fix a compilation error when the parameters or the expected value is an empty tuple
* Typo fix, and a vim-friendly marker is added :)

Please review on this, and after merged I will work on some kind of refactoring
to eliminate duplicated codes, making this feature being closed.