Add extra arity to round

Author: WyattBlue

auto_editor/lang/stdenv.py

@@ -1045,7 +1045,7 @@ def change_file_ext(a, ext) -> str:
         # reals
         "pow": Proc("pow", pow, (2, 2), is_real),
         "abs": Proc("abs", abs, (1, 1), is_real),
-        "round": Proc("round", round, (1, 1), is_real),
+        "round": Proc("round", round, (1, 2), is_real, is_int),
         "max": Proc("max", lambda *v: max(v), (1, None), is_real),
         "min": Proc("min", lambda *v: min(v), (1, None), is_real),
         "max-seq": Proc("max-seq", max, (1, 1), is_sequence),