Fix annotations with literal values (#3411)

stdlib/2/re.pyi

@@ -10,21 +10,21 @@ from typing import (
 )
 
 # ----- re variables and constants -----
-DEBUG = 0
-I = 0
-IGNORECASE = 0
-L = 0
-LOCALE = 0
-M = 0
-MULTILINE = 0
-S = 0
-DOTALL = 0
-X = 0
-VERBOSE = 0
-U = 0
-UNICODE = 0
-T = 0
-TEMPLATE = 0
+DEBUG: int
+I: int
+IGNORECASE: int
+L: int
+LOCALE: int
+M: int
+MULTILINE: int
+S: int
+DOTALL: int
+X: int
+VERBOSE: int
+U: int
+UNICODE: int
+T: int
+TEMPLATE: int
 
 class error(Exception): ...