Changes
/* RENUM [newLine],[oldLine],[step] */
''Example:''
<pre>
10 REM Line 10GOTO 2020 REM Line 20GOTO 3030 REM Line 30GOTO 10
</pre>
becomes, after calling <tt>RENUM 100,20,5</tt>
<pre>
10 REM Line 10GOTO 100100 REM Line 20GOTO 105105 REM Line 30GOTO 10
</pre>
