Expand description
Assert command stdout string is a match to a regex.
Pseudocode:
(command ⇒ stdout ⇒ string) is match (expr into string)
§Example
use std::process::Command;
use regex::Regex;
let mut command = Command::new("bin/printf-stdout");
command.args(["%s", "hello"]);
let matcher = Regex::new(r"ell").unwrap();
assert_command_stdout_is_match!(command, &matcher);