test case: __str__ parsing from __repr__
repr(_): split only on the 1st "=>" of str(self)
_ repr: str(self) parsing test, exhausted radix
_ repr: parse str(self), exhaust var's base digits
py2.6 compatible str.format in test
Merge pull request #57 from Digenis/bugfix-underscore_repr

Bugfix underscore repr, tnx to @Digenis