Expand description
Assert a command (built with program and args) stderr is less than or equal to an expression.
Pseudocode:
(a_program + a_args ⇒ command ⇒ stderr) ≤ (expr into string)
§Example
use assertables::*;
let program = "bin/printf-stderr";
let args = ["%s", "alfa"];
let bytes = vec![b'z', b'z'];
assert_program_args_stderr_le_x!(program, args, bytes);