/tt> becomes a range
    forming metacharacter.

 <a name="lt">

 <h4> Line terminators </h4>

 <p> A <i>line terminator</i> is a one- or two-character sequence that marks
 the end of a line of the input character sequence.  The following are
 recognized as line terminators:

 <ul>

   <li> A newline (line feed) character&nbsp;(<tt>'\n'</tt>),

   <li> A carriage-return character followed immediately by a newline
   character&nbsp;(<tt>"\r\n"</tt>),

   <li> A standalone carriage-return character&nbsp;(<tt>