power returns invalid complex number for negative base and Infinity as exponent

Following inputs return NaN - aNi in Notepad. Seems like all negative bases yield the same:

(-0.5)^Infinity
(-1)^Infinity
(-2)^Infinty

probably the underlying function pow() returns a Complex with both Real and Imaginary part set to NaN. (haven't checked).

Definitely, NaN + aNi is wrong. But whether this is simply an issue with the rendering, or the underlying logic, is to be analyzed. Some thoughts:

• Whether the result should be a Complex with both Real and Imaginary parts set to NaN, is questionable (after all there is a NaN already, no need to introduce a "second, complex NaN" value maybe).

• for -1 < a < 0, the result should probably be zero, as in javascript, this one converges: Math.pow(-0.5,Infinity) // 0

• for a < -1 the result should not be Infinity (so, unlike javascript), because this is clearly divergent. (I don't understand javascript behavior: Math.pow(-2,Infinity) // Infinity

• -Infinity as exponent should also be considered (currently these cases also return incorrect NaN + aNi, but convergence / divergence should also be considered separately for -Infinity)

Start by reviewing issue #804 and the linked open pull request #2097 to determine whether the problem is in power calculation or result rendering. Reproduce the listed negative-base cases with positive and negative Infinity exponents, then define and verify the intended convergence, divergence, and NaN behavior for each case.