Expand description

Assert a command (built with program and args) stderr string is equal to an expression.

Pseudocode:
(program1 + args1 ⇒ command ⇒ stderr) = (expr into string)

§Example

use assertables::*;
let program = "bin/printf-stderr";
let args = ["%s", "alfa"];
let bytes = vec![b'a', b'l', b'f', b'a'];
assert_program_args_stderr_eq_expr!(&program, &args, &bytes);

§Module macros