day16 started

src/common/file.rs

@@ -9,9 +9,9 @@ pub fn read_lines(day_num: usize, file: &str) -> io::Result<Vec<String>> {
     Ok(fs::read_to_string(format_path(day_num, file))?
         .split('\n')
         .with_position()
-        .filter_map(|line| match line {
-            (itertools::Position::Last, line) if line.is_empty() => None,
-            (_, line) => Some(line.to_string()),
+        .filter_map(|(pos, line)| match pos {
+            itertools::Position::Last if line.is_empty() => None,
+            _ => Some(line.to_owned()),
         })
         .collect())
 }