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* merges r23658 from trunk into ruby_1_9_1.yugui2009-06-211-1/+1
* merges r20646 and r20647 from trunk into ruby_1_9_1.yugui2008-12-131-3/+3
* * lib/cmath.rb (log2,cbrt,frexp,ldexp,hypot,erf,erfc,gamma,lgamma):tadf2008-10-181-0/+10
* * complex.c: an instance method image has been removed andtadf2008-09-201-16/+16
* * numeric.c: provides predicate real? instead of scalar?.tadf2008-09-161-17/+17
* * complex.c (nucomp_div): now behaves as quo.tadf2008-08-221-17/+17
* * lib/cmath.rb: new.tadf2008-04-051-0/+223