Ticket #23778: 23778.2.diff

src/wp-includes/class-wp-editor.php

@@ -486 +486 @@
                                         'convert_urls' => false,
                                         'browser_spellcheck' => true,
                                         'fix_list_elements' => true,
-                                        'entities' => '38,amp,60,lt,62,gt',
+                                        'entities' => '160,nbsp,38,amp,60,lt,62,gt',
                                         'entity_encoding' => 'raw',
                                         'keep_styles' => false,