in some cases when in the output string the exponent should be equal zero
the method changes the exponent to one so the last digit from the mantissa
was lost
sample:
Big<1,1> a;
a.info = 0;
a.mantissa = 2147483649u; // (bin) 10000000000000000000000000000001
// first and last bit in the mantissa is set
a.exponent = 0;
std::cout << a << std::endl;
priovious result: 2147483640
it was treated as 214748364e+1
also the method has been a little improved
git-svn-id: svn://ttmath.org/publicrep/ttmath/trunk@312 e52654a7-88a9-db11-a3e9-0013d4bc506e