clippy::never_loop: never loop is usefull when has break 'out

Description

this never loop is usefull when has break 'out

      #[allow(clippy::never_loop)]
      'out: loop {
        for (i, c) in chars.by_ref() {
          if c == '\n' || c == '\r' {
            continue;
          }
          start = i;
          break 'out;
        }
        start = sub.len();
        break;
      }

this will set start to sub.len() if sub not contains "\r" or "\n"

Start by reproducing the Rust snippet from the issue and checking how clippy::never_loop handles the labeled break. Read the lint's existing implementation and tests if available in the repository. Done means the shown loop is no longer incorrectly reported as never looping while genuine never-loop cases remain covered.