1. Slap this code into a file 2. Run this file, pass in a list of .coffee files that you have read/write access to 3. Profit? (all of your single line comments will be converted to block comments)

gistfile1.rb

#!/usr/bin/env ruby

# Take in a file
# Read each line
# if it contains a single #, then do a regexp replace to make it ### <text> ###
#

# Each file
ARGV.each do |file_name|
  # Open the file read only so we can grab it's contents
  file = File.open(file_name, 'r')
  buffer = []

  # Inside of each file, push each line into a buffer, expand single comments to ### and end each line with ###
  file.each do |line|
    if line.match(/(.+[^#])#([^#].+)/) then
      buffer.push "#{$1}####{$2} ###\n"
    else
      buffer.push line
    end
  end

  # Reopen the file and write out our buffer
  file = File.open(file_name, 'w')

  buffer.each do |line|
    file.write(line)
  end

  file.close
end