diff --git a/src/grapheme.rs b/src/grapheme.rs
index b09efed..4d189f3 100644
--- a/src/grapheme.rs
+++ b/src/grapheme.rs
@@ -517,14 +517,14 @@ impl GraphemeCursor {
         for ch in chunk.chars().rev() {
             if self.grapheme_category(ch) != gr::GC_Regional_Indicator {
                 self.ris_count = Some(ris_count);
-                self.decide((ris_count % 2) == 0);
+                self.decide(ris_count.is_multiple_of(2));
                 return;
             }
             ris_count += 1;
         }
         self.ris_count = Some(ris_count);
         if chunk_start == 0 {
-            self.decide((ris_count % 2) == 0);
+            self.decide(ris_count.is_multiple_of(2));
         } else {
             self.pre_context_offset = Some(chunk_start);
             self.state = GraphemeState::Regional;
diff --git a/src/lib.rs b/src/lib.rs
index d15ac0b..cf51fd7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -258,7 +258,7 @@ impl UnicodeSegmentation for str {
     }
 
     #[inline]
-    fn grapheme_indices(&self, is_extended: bool) -> GraphemeIndices {
+    fn grapheme_indices(&self, is_extended: bool) -> GraphemeIndices<'_> {
         grapheme::new_grapheme_indices(self, is_extended)
     }
 
@@ -293,7 +293,7 @@ impl UnicodeSegmentation for str {
     }
 
     #[inline]
-    fn split_sentence_bound_indices(&self) -> USentenceBoundIndices {
+    fn split_sentence_bound_indices(&self) -> USentenceBoundIndices<'_> {
         sentence::new_sentence_bound_indices(self)
     }
 }
diff --git a/src/word.rs b/src/word.rs
index 1a46b39..b265709 100644
--- a/src/word.rs
+++ b/src/word.rs
@@ -1027,8 +1027,8 @@ mod tests {
         new_ascii_word_bound_indices, new_unicode_words_ascii, new_word_bound_indices,
     };
     use std::string::String;
+    use std::vec;
     use std::vec::Vec;
-    use std::{format, vec};
 
     use proptest::prelude::*;