remove_trailing_space.rb

#!/usr/bin/env ruby
# Simple utility to remove trailing space in the end of lines
# Takes as first argument the file to be processed.

lines = []
File.open(ARGV[0]).each do |line|
        line.reverse =~ /\s*(.*)/
        lines << $1.reverse
end

File.open(ARGV[0],"w") { |file| lines.each { |line| file << line << "\n" } }