Function del_char_start_tests

codegenr/src/helpers/string_ext.rs:234–241

(v: &str, trimmer: &str, expected: &str)

    pascal
  }

  fn camel_case(&self) -> String {
    let (_, camel) = self
      .trim()
      .chars()
      .fold((Some(false), String::with_capacity(self.len())), |acc, x| {
        let (upper_next, mut s) = acc;
        if is_out_of_case(x) {
          return (Some(true), s);
        }