Initial divergences from upstream (#1)

src/range.rs

@@ -218,7 +218,7 @@ impl<V: Ord> Range<V> {
                 .segments
                 .last()
                 .expect("if there is a first element, there must be a last element");
-            (start.as_ref(), end.1.as_ref())
+            (bound_as_ref(start), bound_as_ref(&end.1))
         })
     }
 
@@ -321,6 +321,15 @@ fn within_bounds<V: PartialOrd>(v: &V, segment: &Interval<V>) -> Ordering {
     Ordering::Greater
 }
 
+/// Implementation of [`Bound::as_ref`] which is currently marked as unstable.
+fn bound_as_ref<V>(bound: &Bound<V>) -> Bound<&V> {
+    match bound {
+        Included(v) => Included(v),
+        Excluded(v) => Excluded(v),
+        Unbounded => Unbounded,
+    }
+}
+
 fn valid_segment<T: PartialOrd>(start: &Bound<T>, end: &Bound<T>) -> bool {
     match (start, end) {
         (Included(s), Included(e)) => s <= e,
@@ -545,7 +554,7 @@ impl<V: Display + Eq> Display for Range<V> {
         } else {
             for (idx, segment) in self.segments.iter().enumerate() {
                 if idx > 0 {
-                    write!(f, " | ")?;
+                    write!(f, ", ")?;
                 }
                 match segment {
                     (Unbounded, Unbounded) => write!(f, "*")?,
@@ -556,7 +565,7 @@ impl<V: Display + Eq> Display for Range<V> {
                         if v == b {
                             write!(f, "=={v}")?
                         } else {
-                            write!(f, ">={v}, <={b}")?
+                            write!(f, ">={v},<={b}")?
                         }
                     }
                     (Included(v), Excluded(b)) => write!(f, ">={v}, <{b}")?,