nicer print output with empty lists/tables

src/ndspkg/types/hashtable.nim

@@ -139,6 +139,8 @@ proc tableDelete*[U, V](tbl: Table[U, V], key: U): bool =
   return true
   
 proc `$`*[U, V](tbl: NdTable[U, V]): string =
+  if tbl[].count == 0:
+    return "@{}"
   result = "@{ "
   for i in countup(0, tbl.cap.int - 1):
     let entry = tbl[].entries[i]

src/ndspkg/types/ndlist.nim

@@ -82,6 +82,8 @@ proc getLength*[T](list: List[T]): int {.inline.} =
     list.len
 
 proc `$`*[T](list: List[T]): string =
+  if list.len == 0:
+    return "@[]"
   result = "@[ "
   for i in countup(0, list.len - 1):
     mixin `$`