None, True and False literals are also expressions

python/src/com/jetbrains/python/PyElementTypes.java

@@ -102,7 +102,7 @@ public interface PyElementTypes {
                                          LIST_LITERAL_EXPRESSION, TUPLE_EXPRESSION, KEYWORD_ARGUMENT_EXPRESSION, STAR_ARGUMENT_EXPRESSION,
                                          LAMBDA_EXPRESSION, LIST_COMP_EXPRESSION, DICT_LITERAL_EXPRESSION, KEY_VALUE_EXPRESSION,
                                          REPR_EXPRESSION, GENERATOR_EXPRESSION, CONDITIONAL_EXPRESSION, YIELD_EXPRESSION,
-                                         TARGET_EXPRESSION);
+                                         TARGET_EXPRESSION, NONE_LITERAL_EXPRESSION, BOOL_LITERAL_EXPRESSION);
 
   TokenSet LIST_LIKE_EXPRESSIONS = TokenSet.create(LIST_LITERAL_EXPRESSION, LIST_COMP_EXPRESSION, TUPLE_EXPRESSION);
 

python/testData/highlighting/regularAfterVarArgs.py

@@ -1,2 +1,3 @@
 def sortwords(*wordlist, case_sensitive=False): pass
 def mixedargs_sum(a, b=0, *arg, k1, k2=0): pass
+def foo(a='b', b=None, c=None, d=1): pass