Merge pull request #271 from epage/clippy

style: Make clippy happy

src/trace/internals.rs

@@ -97,7 +97,7 @@ pub fn start<I: Stream>(
  let (debug_slice, eof) = if let Some(debug_offset) = debug_slice
  .char_indices()
  .enumerate()
- .find_map(|(pos, (offset, _))| (input_width <= pos).then(|| offset))
+ .find_map(|(pos, (offset, _))| (input_width <= pos).then_some(offset))
  {
  debug_slice.truncate(debug_offset);
  let eof = "";