+/* Get aliases for icon name. This allows to avoid duplication of
+ * icons when new versions of functions are introduced for the
+ * toolbar. A good example is the introduction of layout-toggle in
+ * #9864.
+ * The file is parsed by Lexer. Each line is of the form
+ * <original substring> <replacement substring>
+ *
+ * The return value is another icon file name that can be queried.
+ */
+// FIXME: consider using regular expressions.