Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling aSymbol. aSymbol is
supposed not to be #= or #~= (since those don't fail if aNumber is not
a Number).
retryDifferenceCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #-.
retryDivisionCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #/.
retryEqualityCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #=.
retryError
Raise an error—a retrying method was called with two arguments
having the same generality.
retryInequalityCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #~=.
retryMultiplicationCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #*.
retryRelationalOp: aSymbol coercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling aSymbol (<, <=, >, >=).
retrySumCoercing: aNumber
Coerce to the other number's class the one number between the receiver and
aNumber which has the lowest, and retry calling #+.