DB<3> < print "huhu"
  DB<4> 
 
  DB<4> <<
pre-perl commands:
	<< -- print "huhu"
  DB<5> h <
< ?            List Perl commands to run before each prompt.
< expr        Define Perl command to run before each prompt.
<< expr        Add to the list of Perl commands to run before each prompt.
< *                Delete the list of perl commands to run before each prompt.