diff --git a/dill/_dill.py b/dill/_dill.py
index 67d519c8..07bc28a3 100644
--- a/dill/_dill.py
+++ b/dill/_dill.py
@@ -797,7 +797,7 @@ def _create_code(*args):
     BYTES = (bytes, str)
     BYTES_NONE = (bytes, str, type(None))
     encode_bytes = lambda fields, patterns: {
-            key: val.encode() if pat == BYTES and isinstance(val, str) else val \
+            key: val.encode() if pat in (BYTES, BYTES_NONE) and isinstance(val, str) else val \
                     for (key, val), pat in zip(fields, patterns)
             }
 
@@ -840,11 +840,9 @@ def _create_code(*args):
 
     # Special case: lnotab and linetable
     if CODE_VERSION >= (3,10):
-        if not LNOTAB:  # came from <= 3.9
-            fields['linetable'] = b''
+        fields.setdefault('linetable', b'')
     else:
-        if LNOTAB or 'exceptiontable' in fields:  # came from >= 3.11 in the second case
-            fields['lnotab'] = LNOTAB
+        fields.setdefault('lnotab', LNOTAB)
 
     args = (fields[param] for param in CODE_PARAMS)
     return CodeType(*args)
diff --git a/dill/_shims.py b/dill/_shims.py
index 27ff1262..c9cc8525 100644
--- a/dill/_shims.py
+++ b/dill/_shims.py
@@ -265,7 +265,7 @@ def _delattr(cell, name):
 _setattr = Getattr(_dill, '_setattr', setattr)
 _delattr = Getattr(_dill, '_delattr', delattr)
 
-# Structural Patter Matching for reduce tuples.
+# Structural Pattern Matching for reduce tuples.
 @move_to(_dill)
 class match:
     """
@@ -299,7 +299,7 @@ def __exit__(self, exc_type, exc_val, exc_tb):
     def __getattr__(self, item):
         return self.vars[item]
     def case(self, *args, **kwargs):
-        """just handles tuple patters"""
+        """just handles tuple patterns"""
         self.patterns = args + tuple(kwargs.values())
         if len(self.value) != len(self.patterns):
             return False