rbx-string-index.rb

#!/usr/bin/env ruby

text = "</script></head>\n"
outpath = 'text.txt'

File.open(outpath, 'w') { |f| f.write(text) }
text_read = File.read(outpath)

puts "text == text_read          => #{(text == text_read).inspect}"
puts "text.index('</head>')      => #{text.index('</head>')}"
puts "text_read.index('</head>') => #{text_read.index('</head>')}"