Turns out I can't test it either, since it was introduced in 5.26.

However, brian d foy states here that the leading whitespace from the final delimiter is what's used to determine what gets stripped from every line (as you had supposed). And, that lines with insufficient indentation cause a compile-time error.

In reply to Re^2: indented here-doc "delimiter" by ibm1620
in thread indented here-doc "delimiter" by ibm1620

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