refactor: clippy fixes

Author: roderickvd

src/math.rs

@@ -139,7 +139,7 @@ mod test {
     /// - Practical audio range (-60dB to +40dB): max errors ~1x ε
     /// - Extended range (-100dB to +100dB): max errors ~2.3x ε
     /// - Extreme edge cases beyond ±100dB have larger errors but are rarely used
-
+    ///
     /// Based on [Wikipedia's Decibel article].
     ///
     /// [Wikipedia's Decibel article]: https://web.archive.org/web/20230810185300/https://en.wikipedia.org/wiki/Decibel

src/mixer.rs

@@ -177,7 +177,9 @@ impl MixerSource {
         let mut pending = self.input.0.pending_sources.lock().unwrap(); // TODO: relax ordering?
 
         for source in pending.drain(..) {
-            let in_step = self.sample_count % source.channels().get() as usize == 0;
+            let in_step = self
+                .sample_count
+                .is_multiple_of(source.channels().get() as usize);
 
             if in_step {
                 self.current_sources.push(source);

src/source/linear_ramp.rs

@@ -88,7 +88,7 @@ where
             factor = self.start_gain * (1.0f32 - p) + self.end_gain * p;
         }
 
-        if self.sample_idx % (self.channels().get() as u64) == 0 {
+        if self.sample_idx.is_multiple_of(self.channels().get() as u64) {
             self.elapsed_ns += 1000000000.0 / (self.input.sample_rate().get() as f32);
         }