Assert an absolute difference is less than or equal to a delta expression.
Pseudocode: | a - b | ≤ Δ
use assertables::*; let a = 10; let b = 13; let delta = 4; assert_abs_diff_le!(a, b, delta);
assert_abs_diff_le
assert_abs_diff_le_as_result
debug_assert_abs_diff_le