Make OPoint call `T::fmt` to respect formatting modifiers (#1336)

src/geometry/point.rs

@@ -511,10 +511,11 @@ where
 
         let mut it = self.coords.iter();
 
-        write!(f, "{}", *it.next().unwrap())?;
+        <T as fmt::Display>::fmt(it.next().unwrap(), f)?;
 
         for comp in it {
-            write!(f, ", {}", *comp)?;
+            write!(f, ", ")?;
+            <T as fmt::Display>::fmt(comp, f)?;
         }
 
         write!(f, "}}")

tests/geometry/point.rs

@@ -92,3 +92,11 @@ fn to_homogeneous() {
 
     assert_eq!(a.to_homogeneous(), expected);
 }
+
+#[test]
+fn display_fmt_respects_modifiers() {
+    let p = Point3::new(1.23, 3.45, 5.67);
+    assert_eq!(&format!("{p}"), "{1.23, 3.45, 5.67}");
+    assert_eq!(&format!("{p:.1}"), "{1.2, 3.5, 5.7}");
+    assert_eq!(&format!("{p:.0}"), "{1, 3, 6}");
+}