remove unnecessary copy/paste from part2

README.md

@@ -51,7 +51,7 @@ Solutions for [Advent of Code](https://adventofcode.com/) in [Rust](https://www.
 | [Day 15](./src/bin/15.rs) | `20.4µs` | `85.9µs` |
 | [Day 16](./src/bin/16.rs) | `58.3µs` | `1.7ms` |
 | [Day 17](./src/bin/17.rs) | `1.6ms` | `3.7ms` |
-| [Day 18](./src/bin/18.rs) | `8.1µs` | `7.7µs` |
+| [Day 18](./src/bin/18.rs) | `8.1µs` | `6.9µs` |
 
 **Total: 14.09ms**
 <!--- benchmarking table --->

src/bin/18.rs

@@ -35,13 +35,9 @@ pub fn part_two(input: &str) -> Option<i64> {
     {
         let hex = &line[line.len() - 7..line.len() - 1];
         let dir: Direction = hex[5].try_into().expect("valid direction");
-        let distance = hex[..5]
-            .iter()
-            .copied()
-            .take_while(|&ch| ch != b' ')
-            .fold(0, |acc, ch| {
-                acc * 16 + char::from(ch).to_digit(16).unwrap() as i64
-            });
+        let distance = hex[..5].iter().copied().fold(0, |acc, ch| {
+            acc * 16 + char::from(ch).to_digit(16).unwrap() as i64
+        });
         let next = prev.move_in_dir(dir, distance);
         area += prev.x * next.y - prev.y * next.x;
         border_points += distance;