I was reading the Perl docs on heredoc just now, and found one description that I found very confusing. I'm hoping you can help me understand what's being described here: http://perldoc.perl.org/perlop.html#Quote-Like-Operators

Specifically, this part:

If you use a here-doc within a delimited construct, such as in s///eg, the quoted material must come on the lines following the final delimiter. So instead of 

    s/this/<<E . 'that'
    the other
    E
     . 'more '/eg;

[download]
you have to write 
    s/this/<<E . 'that'
     . 'more '/eg;
    the other
    E

[download]

I understand the part about placing the heredoc after the s// construct, but the substitution itself is confusing. Does it mean the same as this? 

s/this/the other\nthatmore /eg;

[download]
I guess I'm wrong to assume those periods are concatenation operators, but if so, what's going on here? What's the use case?

Thanks very much in advance!

In reply to heredoc within a delimited construct by BeneSphinx

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