it is possible to create `CodedCustomException` without an argument

CHANGELOG.md

@@ -3,3 +3,5 @@
 * added `sleep_interval` to `hang_until_sig`
 * added `read_lines`
 * changed `ImpossibleError` to be a `BaseException`
+* it is possible to create `CodedCustomException` without an argument
+

satella/__init__.py

-__version__ = '2.14.31a5'
+__version__ = '2.14.31'

satella/exceptions.py

@@ -123,7 +123,7 @@ class CodedCustomException(CustomException, metaclass=CodedCustomExceptionMetacl
     >>> assert not isinstance(a, MyCode5Diff)
     """
 
-    def __init__(self, message, code=None, *args, **kwargs):
+    def __init__(self, message='', code=None, *args, **kwargs):
         super().__init__(message, code, *args, **kwargs)
         self.message = message  # type: str
         if code is not None:

tests/test_exceptions.py

@@ -2,10 +2,12 @@ import unittest
 
 
 from satella.exceptions import BaseSatellaError, CustomException, CodedCustomException, \
-    ImpossibleError
+    ImpossibleError, CodedCustomException
 
 
 class TestExceptions(unittest.TestCase):
+    def test_coded_custom_exception_no_args(self):
+        CodedCustomException()
 
     def test_impossible_error(self):
         try: