Ruby heredoc makes entire document a string literal in eclipse ide - ruby

Question

I am trying to use heredoc to send an email in Ruby, but my entire code seems to become a string literal. I am using Eclipse with the Ruby plugin, and I can't figure out what the problem is. The code here is taken directly from a tutorial, so I don't understand why it isn't working. Can anyone shed some light on this?
Here is my code:
require 'net/smtp'
filename = "/tmp/test.txt"
# Read a file and encode it into base64 format
filecontent = File.read(filename)
encodedcontent = [filecontent].pack("m") # base64
marker = "AUNIQUEMARKER"
body = <<-EOF
This is a test email to send an attachement.
EOF
# Define the main headers.
part1 = <<-EOF
From: Private Person <me#fromdomain.net>
To: A Test User <test#todmain.com>
Subject: Sending Attachement
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=#{marker}
--#{marker}
EOF
# Define the message action
part2 = <<-EOF
Content-Type: text/plain
Content-Transfer-Encoding:8bit
#{body}
--#{marker}
EOF
# Define the attachment section
part3 = <<-EOF
Content-Type: multipart/mixed; name=\"#{filename}\"
Content-Transfer-Encoding:base64
Content-Disposition: attachment; filename="#{filename}"
#{encodedcontent}
--#{marker}--
EOF
mailtext = part1 + part2 + part3
# Let's put our code in safe area
begin
Net::SMTP.start('localhost') do |smtp|
smtp.sendmail(mailtext, 'me#fromdomain.net',
['test#todmain.com'])
end
rescue Exception => e
print "Exception occured: " + e
end
This is what it looks like in Eclipse:

Answer 1

I know this question is a little old, but I think that if you use tab before the closing "EOF" it should work. I think that when you add the "-" after the "<<" it looks for a tabulation before the end word, so an alternative could be deleting the "-".
I'm not super sure about it, I don't really use the heredocs because it has problems with the coding of the strings (like á é í...), but if someone is having this problem they should check that out.
I hope this helps someone.