From: Brian Candler <b.candler@...>
Date: 2010-08-05T17:01:55+09:00
Subject: Re: net/smtp

You must not put spaces before the Subject: header. Align your text with 
the left-hand column.

Using a heredoc with minus sign, you are allowed to indent the 
terminating symbol:

   msg = <<-EOS
Subject: foo
etc
   EOS

But you still need to align the text itself to the left-hand edge. If 
you don't think that's pretty, then you could use gsub to remove the 
leading spaces.

(Incidentally, you said you were using a heredoc, but the code you 
posted wasn't)
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