Heredoc in one-liner?

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my %text_blocks;
$text_blocks{en}{prolog} =<<'PROLOG';
...
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PROLOG

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#     Error:  syntax error at Automailer.pm line 32, near "tldr@nohelp
+"
# Global symbol "@nohelp" requires explicit package name at Automailer
+.pm line 32.

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perl -e 'package test;$text <<'TEST';test@heredoc;\r\nTEST;print "$tex
+t\n"'

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