warning: length comparison to zero
  --> src/nodes/highlight.rs:56:35
   |
56 |         let delimiter_length = if self.nodes.len() == 0 {
   |                                   ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.nodes.is_empty()`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
   = note: `#[warn(clippy::len_zero)]` on by default