implement unstable new_range feature

for RFC 3550, tracking issue #123741

compiler/rustc_span/src/symbol.rs

@@ -294,9 +294,12 @@ symbols! {
         ProceduralMasqueradeDummyType,
         Range,
         RangeBounds,
+        RangeCopy,
         RangeFrom,
+        RangeFromCopy,
         RangeFull,
         RangeInclusive,
+        RangeInclusiveCopy,
         RangeTo,
         RangeToInclusive,
         Rc,
@@ -1367,6 +1370,7 @@ symbols! {
         new_lower_hex,
         new_octal,
         new_pointer,
+        new_range,
         new_unchecked,
         new_upper_exp,
         new_upper_hex,