2nd try to correct mathics.session.MathicsSession

Author: rocky

CHANGES.rst

@@ -3,7 +3,7 @@
 CHANGES
 =======
 
-6.0.3
+6.0.3 and 6.0.4
 -----
 
 Correct type annotation in ``mathics.session.MathicsSession`` See `Issue #934 <https://github.com/Mathics3/mathics-core/issues/934>`_.

mathics/session.py

@@ -60,7 +60,7 @@ def __init__(
         add_builtin=True,
         catch_interrupt=False,
         form="InputForm",
-        character_encoding=Optional[str],
+        character_encoding: Optional[str]=None,
     ):
         if character_encoding is not None:
             mathics.settings.SYSTEM_CHARACTER_ENCODING = character_encoding

mathics/version.py

@@ -5,4 +5,4 @@
 # well as importing into Python. That's why there is no
 # space around "=" below.
 # fmt: off
-__version__="6.0.3"  # noqa
+__version__="6.0.4"  # noqa