@x
GARBAGE GARBAGE GARBAGE
@y
\It{Thus, compare the original version of this line, which was changed with
the change file \.{demo.ch}.} Note the star after the module number, which
reminds you that this module was changed. When any module is changed, the
index is also marked as changed.
@z

@[
@x
        aaa = bbb
        ccc = ddd
@y
 /* Substituted this comment and the next line for two code lines. */
        substitute = code
@z
