Use new-style format strings

Author: mbrubeck

src/lib.rs

@@ -1911,7 +1911,7 @@ impl<E: fmt::Debug + Error + 'static> Error for ParseNotNanError<E> {
 impl<E: fmt::Display> fmt::Display for ParseNotNanError<E> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {
-            ParseNotNanError::ParseFloatError(e) => write!(f, "Parse error: {}", e),
+            ParseNotNanError::ParseFloatError(e) => write!(f, "Parse error: {e}"),
             ParseNotNanError::IsNaN => write!(f, "NotNan parser encounter a NaN"),
         }
     }

tests/test.rs

@@ -475,7 +475,7 @@ fn hash_is_good_for_whole_numbers() {
     // many, but should guard against transient issues
     // that will result from using RandomState
     let pct_unique = set.len() as f64 / limit as f64;
-    assert!(0.99f64 < pct_unique, "percent-unique={}", pct_unique);
+    assert!(0.99f64 < pct_unique, "percent-unique={pct_unique}");
 }
 
 #[test]
@@ -494,7 +494,7 @@ fn hash_is_good_for_fractional_numbers() {
     // many, but should guard against transient issues
     // that will result from using RandomState
     let pct_unique = set.len() as f64 / limit as f64;
-    assert!(0.99f64 < pct_unique, "percent-unique={}", pct_unique);
+    assert!(0.99f64 < pct_unique, "percent-unique={pct_unique}");
 }
 
 #[test]