Finding here-document fu in perldoc is not as straightforward as it might be as well.
I must admit this is true. In some sense it is true of all quote-like operators...
In short, I don't think the question at hand is necessarily as obvious as you make it out to be.
I think you're right, in fact I didn't give him a completely RTFM kinda answer, but I explained which two constructs were involved in that statement and pointed to the possibly not so obvious entry points in the docs for both.

In reply to Re^3: Meaning of 'use constant USAGEMSG = > ...' by blazar
in thread Meaning of 'use constant USAGEMSG = > ...' by rjsaulakh

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