Expand description
Assert a command (built with program and args) stdout string is not equal to an expression.
Pseudocode:
(program1 + args1 ⇒ command ⇒ stdout ⇒ string) ≠ (expr into string)
§Example
let program = "bin/printf-stdout";
let args = ["%s", "hello"];
let s = String::from("zzz");
assert_program_args_stdout_ne_expr!(&program, &args, s);