====== AUTO ======

===== Syntax =====

<code basic>
AUTO [start|.][, [increment]]
</code>

===== Description =====

Automatic line numbering for manual program entry. If the line already exists, then an
asterisk is displayed and pressing ENTER leaves the line as-is.  If the line does not
exist, then an asterisk is not displayed and pressing ENTER skips to next line. 
AUTO mode is terminated by any ERROR or by pressing Control-C.

If start argument omitted, then 10 used as default. Dot means usage of last entered line in auto mode.

If increment argument omitted, then 10 used as default.