added missing arguments vistor from Armin's original repo

AUTHORS

@@ -8,3 +8,4 @@ And with some modifications based on Armin's code:
 * Patrick Maupin <pmaupin@gmail.com>
 * Abhishek L <abhishek.lekshmanan@gmail.com>
 * Bob Tolbert <bob@eyesopen.com>
+* Whyzgeek <whyzgeek@gmail.com>

CHANGES

@@ -8,3 +8,4 @@
            information.
 0.4     -- Added a visitor for NameConstant.
            Added initial test suite and documentation.
+0.4.1   -- Added missing SourceGenerator.visit_arguments()

astor/__init__.py

@@ -9,7 +9,7 @@ Copyright 2013 (c) Berker Peksag
 
 """
 
-__version__ = '0.4'
+__version__ = '0.4.1'
 
 from .codegen import to_source  # NOQA
 from .misc import iter_node, dump, all_symbols, get_anyop  # NOQA

astor/codegen.py

@@ -507,3 +507,6 @@ class SourceGenerator(ExplicitNodeVisitor):
         if node.ifs:
             for if_ in node.ifs:
                 self.write(' if ', if_)
+
+    def visit_arguments(self, node):
+        self.signature(node)

tests/test_codegen.py

@@ -47,6 +47,13 @@ class CodegenTestCase(unittest.TestCase):
         source = "del obj.x"
         self.assertAstSourceEqual(source)
 
+    def test_arguments(self):
+        source = textwrap.dedent("""\
+        j = [1, 2, 3]
+
+        def test(a1, a2, b1=j, b2='123', b3={}, b4=[]):
+            pass""")
+        self.assertAstSourceEqual(source)
 
 if __name__ == '__main__':
     unittest.main()