Make repr(HSlice) always available (#22332)

Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com>
(cherry picked from commit d37b620757)

tests/stdlib/trepr.nim

@@ -40,7 +40,7 @@ template main() =
   #[
   BUG:
   --gc:arc returns `"abc"`
-  regular gc returns with address, e.g. 0x1068aae60"abc", but only 
+  regular gc returns with address, e.g. 0x1068aae60"abc", but only
   for c,cpp backends (not js, vm)
   ]#
   block:
@@ -293,7 +293,7 @@ func fn2(): int =
 
       *a: b
       do: c
-    
+
     doAssert a == """foo(a, b, (c, d)):
   e
   f
@@ -322,5 +322,7 @@ else:
 do:
   c"""
 
+  doAssert repr(1..2) == "1 .. 2"
+
 static: main()
 main()