Make Debug for Rect heed precision

crates/emath/src/rect.rs

@@ -710,7 +710,11 @@ impl Rect {
 
 impl fmt::Debug for Rect {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "[{:?} - {:?}]", self.min, self.max)
+        if let Some(precision) = f.precision() {
+            write!(f, "[{1:.0$?} - {2:.0$?}]", precision, self.min, self.max)
+        } else {
+            write!(f, "[{:?} - {:?}]", self.min, self.max)
+        }
     }
 }