Simplify num_bits_in_integer_that_are_not_leading_zeroes
Simplify num_bits_in_integer_that_are_not_leading_zeroes

This seems to have no performance impact, or maybe slightly positive.

idupree/Lasercake,idupree/Lasercake,elidupree/Lasercake,idupree/Lasercake,idupree/Lasercake,Lasercake/Lasercake,idupree/Lasercake,elidupree/Lasercake,Lasercake/Lasercake,elidupree/Lasercake,Lasercake/Lasercake,elidupree/Lasercake,Lasercake/Lasercake,elidupree/Lasercake,elidupree/Lasercake,Lasercake/Lasercake,idupree/Lasercake,idupree/Lasercake,elidupree/Lasercake