Handle ... accordingly in escape binding

Author: josevalim

lib/ecto/query/builder.ex

@@ -926,10 +926,12 @@ defmodule Ecto.Query.Builder do
     end
   end
 
-  defp escape_bind({{{var, _, context}, ix}, _}) when is_atom(var) and is_atom(context),
-    do: {:pos, var, ix}
+  defp escape_bind({{:..., _, _context}, ix}),
+    do: {:pos, :..., ix}
   defp escape_bind({{var, _, context}, ix}) when is_atom(var) and is_atom(context),
     do: {:pos, var, ix}
+  defp escape_bind({{{var, _, context}, ix}, _}) when is_atom(var) and is_atom(context),
+    do: {:pos, var, ix}
   defp escape_bind({{name, {var, _, context}}, _ix}) when is_atom(name) and is_atom(var) and is_atom(context),
     do: {:named, var, name}
   defp escape_bind({{{:^, _, [expr]}, {var, _, context}}, _ix}) when is_atom(var) and is_atom(context),