Adding the date of last modify will be very easy since we've already done it in the previous tutorial (Section 3.5). This time we take the date of last modify of the source file instead of the data the output page has been build (see Section 19.3 for further details).
So, let's edit lib/template.cws one more time and replace:
<p class="light"> Revision Date </p>
with:
<p class="light"> Last revision: @@ fdate (absinputfile (), "#M #d, #y") @@ </p>
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