mcdev/test/resources/9999999/script/get_mixed-rcb-id-expected.html

Accenture Salesforce Marketing Cloud DevTools

<script runat="server">
    //dummy
</script>
line1
%%[
    SET @test = 'bla bla'
]%%
line2 %%= ContentBlockById(1295064) =%% still line2; collapsed to line2 because it's assumed
HTML
<script runat="server">
    Platform.Function.ContentBlockById(1295064);
</script>