Simple example for removing leading whitespace with Ruby's heredoc operator

heredoc_remove_leading_whitespace.rb

# This is not as sophisticated as ActiveSupport's `strip_heredoc`, but is the simplest solution for 
# removing leading whitespace.
# For more nuanced whitespace removal, take a look at http://apidock.com/rails/String/strip_heredoc

puts "With leading whitespace:"
puts <<-TEST
      This is a test.
      To remove leading spaces.
      From Ruby's heredoc operator.
     TEST


puts "\nWithout leading whitespace:"
puts <<-TEST.gsub(/^ */, "")
      This is a test.
      To remove leading spaces.
      From Ruby's heredoc operator.
     TEST

# >> With leading whitespace:
# >>       This is a test.
# >>       To remove leading spaces.
# >>       From Ruby's heredoc operator.
# >> 
# >> Without leading whitespace:
# >> This is a test.
# >> To remove leading spaces.
# >> From Ruby's heredoc operator.