diff --git a/lib/editor/tinymce/upgrade.txt b/lib/editor/tinymce/upgrade.txt
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@@ -0,0 +1,9 @@
+This files describes API changes in /lib/editor/tinymce/* - TinyMCE editor,
+information provided here is intended especially for developers.
+
+
+=== 2.4 ===
+
+new features:
+
+* subplugin support - see http://docs.moodle.org/dev/TinyMCE_plugins
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