+# No conversion necessary.
+
+# Incremented to format 22, by ef
+# Add pygmentize_command for the python pygments syntax highlighter
+# No conversion necessary.
+
+# Incremented to format 23, by spitz
+# Add default_platex_view_format, a default output format for
+# Japanese documents via pLaTeX.
+# No conversion necessary.
+
+# Incremented to format 24, by spitz
+# Rename collapsable to collapsible
+
+# Incremented to format 25, by lasgouttes
+# Remove use_qimage preference
+
+# Incremented to format 26, by spitz
+# Rename font_encoding preference
+
+# Incremented to format 27, by spitz
+# Add optional flavor value to needaux flag
+
+# Incremented to format 28, by spitz
+# Remove date_insert_format