Found trivial regex RS-W1027
Performance
Minor
Certain regexes that are used with Regex::new or RegexBuilder::new may be
replaced by common str methods, such as str::starts_with, str::ends_with,
str::contains and str::cmp.
Bad practice
let s = "Mary had a little lambda";
let re = Regex::new("^Mary").unwrap();
re.is_match(s);
let re = Regex::new("little").unwrap();
re.is_match(s);
Recommended
let s = "Mary had a little lambda";
s.starts_with("Mary");
s.contains("little");