Assert an expression is Err and its value is not equal to an expression.
Pseudocode: (a ⇒ Err(a1) ⇒ a1) ≠ b
use assertables::*; let a: Result<i8, i8> = Err(1); let b: i8 = 2; assert_err_ne_x!(a, b);
assert_err_ne_x
assert_err_ne_x_as_result
debug_assert_err_ne_x