title: Least used delimiter character in normal text < ASCII 128
body: <p>For coding reasons which would horrify you (I'm too embarrassed to say), I need to store a number of text items in a single string.</p>
  
  <p>I will delimit them using a character.</p>
  
  <p>Which character is best to use for this, i.e. which character is the least likely to appear in the text? Must be printable and probably less than 128 in ASCII to avoid locale issues.</p>