API change/revert: Bytes should be returned as a single byte string, not a tuple of integers

PIL/TiffImagePlugin.py

@@ -544,8 +544,7 @@ class ImageFileDirectory_v2(collections.MutableMapping):
                             self.tagtype[tag] = 2
 
         if self.tagtype[tag] == 7 and bytes is not str:
-            values = [value.encode("ascii", 'replace') if isinstance(value, str) else value
+            values = [value.encode("ascii", 'replace') if isinstance(value, str) else value]
-                      for value in values]
 
         values = tuple(info.cvt_enum(value) for value in values)
 
@@ -604,8 +603,7 @@ class ImageFileDirectory_v2(collections.MutableMapping):
 
     @_register_loader(1, 1)  # Basic type, except for the legacy API.
     def load_byte(self, data, legacy_api=True):
-        return (data if legacy_api else
+        return data
-                tuple(map(ord, data) if bytes is str else data))
 
     @_register_writer(1)  # Basic type, except for the legacy API.
     def write_byte(self, data):

Tests/test_file_tiff.py

@@ -287,7 +287,7 @@ class TestFileTiff(PillowTestCase):
             ifd = TiffImagePlugin.ImageFileDirectory_v2()
             data = b"abc"
             ret = ifd.load_byte(data, legacy_api)
-            self.assertEqual(ret, b"abc" if legacy_api else (97, 98, 99))
+            self.assertEqual(ret, b"abc")
 
     def test_load_string(self):
         ifd = TiffImagePlugin.ImageFileDirectory_v2()