Function regex_transform_tests

codegenr/src/helpers/string_ext.rs:199–202

(arg: &str, regex_extractor: &str, regex_replacer: &str, expected: &str)

    self.trim_end_matches(trimmer).to_string()
  }

  fn uppercase_first_letter(&self) -> String {
    if self.is_empty_or_whitespaces() {
      return String::default();
    }
    let mut ve: Vec<char> = self.chars().collect();
    ve[0] = ve[0].to_uppercase().next().unwrap();