Edited: Scratch that. haukex has already mentioned this.
If you want your here-docs to be indented with the rest of the code, you'll need to remove leading whitespace from each line manually:

Well, that last sentence is no longer true as of Perl 5.26.

use 5.026;
say <<~'END';
    This adds a new modifier "~" to here-docs that tells the parser
    that it should look for /^\s*$DELIM\n/ as the closing delimiter.
    END

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In reply to Re^7: Is a here-doc a good way to retrieve data file contents for testing? (updated) by haj
in thread Is a here-doc a good way to retrieve data file contents for testing? by Lotus1

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