stdlib/pathname/0/pathname.rbs in rbs-1.3.3 vs stdlib/pathname/0/pathname.rbs in rbs-1.4.0

@@ -753,11 +753,11 @@
 
   # Opens the file for reading or writing.
   #
   # See File.open.
   #
-  def open: (?String mode, ?Integer perm) -> File
-          | [T] (?String mode, ?Integer perm) { (File) -> T } -> T
+  def open: (?(string | int) mode, ?int perm) -> File
+          | [T] (?(string | int) mode, ?int perm) { (File) -> T } -> T
 
   # Opens the referenced directory.
   #
   # See Dir.open.
   #