Fix pow for negative exponents < 1

Author: PaddiM8

kalk/src/kalk_value/mod.rs

@@ -971,7 +971,7 @@ impl KalkValue {
             ) => {
                 if self.has_imaginary()
                     || imaginary_rhs != &0f64
-                    || (real_rhs > &0f64 && real_rhs < &1f64)
+                    || (real < 0f64 && real_rhs.clone().abs() < 1f64)
                 {
                     let a = real;
                     let b = imaginary;
@@ -1576,6 +1576,8 @@ mod tests {
             ((0f64, 2f64), (0f64, 3f64), (-0.0043748f64, 0.0078460f64)),
             ((3f64, 2f64), (0f64, 3f64), (-0.1304148f64, -0.111153f64)),
             ((3f64, 2f64), (4f64, 3f64), (28.8577819f64, -2.422530f64)),
+            ((-9f64, 0f64), (0.5f64, 0f64), (0f64, 3f64)),
+            ((-9f64, 0f64), (-0.5f64, 0f64), (0f64, -1f64 / 3f64)),
             (
                 (3f64, 0f64),
                 (0f64, 1f64 / 3f64),