Test:

<!-- multi-script test -->
<script>parent.alert('step 1 of 3 ("")')</script>
<!-- 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-->
<script>parent.alert('step 2 of 3 ("")')</script>
<meta charset="ISO-8859-9">
<script>parent.alert('step 3 of 3 ("")')</script>

Expected result: Windows-1254

Encoding used by browser is: Script did not run.

Result: Script did not run.