Merge pull request #21 from inthar-raven/booth

chirality should use booth

src/words.rs

@@ -663,14 +663,12 @@ where
 
 /// The chirality of a scale word.
 pub fn chirality(word: &[Letter]) -> Chirality {
-    let mut modes = rotations(word);
-    modes.sort_unstable();
+    let least_mode_word = least_mode(word);
 
     let word_rev: Vec<usize> = word.iter().cloned().rev().collect();
-    let mut modes_rev = rotations(&word_rev);
-    modes_rev.sort_unstable();
+    let least_mode_word_rev = least_mode(&word_rev);
 
-    match modes[0].cmp(&modes_rev[0]) {
+    match least_mode_word.cmp(&least_mode_word_rev) {
         Ordering::Less => Chirality::Right,
         Ordering::Equal => Chirality::Achiral,
         Ordering::Greater => Chirality::Left,