Ruby/String/Here Document

A here document allows you to build strings from multiple lines on the fly
A here document preserves newlines. 
A here document is formed with a << and a delimiting character or string of your choice. 
sonnet = <<29
W
I
A
A
W
F
D
W
Y
29
puts sonnet

# Ruby treats any text that starts with <<TOKEN (where TOKEN can be any uppercase word) as 
# the beginning of a multi-line sequence, and assumes that that text ends with TOKEN. 
print <<HERE
Now
is
the
time
HERE

long_string = <<EOF
Here is a long string
With many paragraphs
EOF
puts long_string