Add Copy action to code blocks in markdown example

core/src/pixels.rs

@@ -79,3 +79,11 @@ impl std::ops::Div<f32> for Pixels {
         Pixels(self.0 / rhs)
     }
 }
+
+impl std::ops::Div<u32> for Pixels {
+    type Output = Pixels;
+
+    fn div(self, rhs: u32) -> Self {
+        Pixels(self.0 / rhs as f32)
+    }
+}