rbx-string-index.rb

#!/usr/bin/env ruby

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