Perl5/Perl6 are different but won't interfere on the same box any more than Ruby and Python would. Perl5 has HEREDOCs too; syntax is a bit different.

print <<"";
Some things
on more than
one line with a TRAILING NEWLINE

# ^^^ blank line matches "" in print and ends statement

print <<"orWITHyourOwnSTYLEendTag";
Some things
on...
orWITHyourOwnSTYLEendTag
[download]

A lot of devs find the "" blank line ending HEREDOC a bit offensive/dangerous but I like it. :P More: Here documents, or how to create multi-line strings in Perl.