Enable --harmony-trailing-commas

test/mjsunit/regress/regress-2470.js

Index: test/mjsunit/regress/regress-2470.js
diff --git a/test/mjsunit/regress/regress-2470.js b/test/mjsunit/regress/regress-2470.js
index 29a0b250acb2e10919e9a8de8b3b73c57ba3cd7d..cba1b06c3e14716cb542dd96d3a4138fbd7fc502 100644
--- a/test/mjsunit/regress/regress-2470.js
+++ b/test/mjsunit/regress/regress-2470.js
@@ -34,12 +34,14 @@ assertThrows('Function("});(function(){");', SyntaxError);
 // Test whether block comments are handled correctly.
 assertDoesNotThrow('Function("/*", "*/", "/**/");');
 assertDoesNotThrow('Function("/*", "a", "*/", "/**/");');
-assertThrows('Function("a", "/*", "*/", "/**/");', SyntaxError);
+assertDoesNotThrow('Function("a", "/*", "*/", "/**/");');
+assertThrows('Function("a", "/*", "*/", "b", "/*", "*/", "/**/");', SyntaxError);
 
 // Test whether line comments are handled correctly.
 assertDoesNotThrow('Function("//", "//")');
 assertDoesNotThrow('Function("//", "//", "//")');
-assertThrows('Function("a", "//", "//")', SyntaxError);
+assertDoesNotThrow('Function("a", "//", "//")');
+assertThrows('Function("a", "", "//", "//")', SyntaxError);
 
 // Some embedders rely on the string representation of the resulting
 // function in cases where no formal parameters are specified.