Description:
------------
There is a very minor issue when a heredoc contains only a single
backslash.

The doc says heredoc behaves exactly as double quoted string - so in this one particular case of the single backslash - we have a case which cannot be produced in a double quoted string - so the behaviour is undefined.

The engine appears to treat is as a 'record separator', but I think
it would be better treated as a backslash.

Im quite happy for this to be closed as bogus - Its just that the code below is from a php test case - I dont suppose anyone will actually do this.

Reproduce code:
---------------
<?php
$heredoc_string_only_backslash =<<<EOT
\
EOT;

$str = $heredoc_string_only_backslash;
var_dump(bin2hex($str));

$str_addslashes = addslashes($str);
var_dump(bin2hex($str_addslashes));

$str_stripslashes = stripslashes($str_addslashes);
var_dump(bin2hex($str_stripslashes));
?>



Expected result:
----------------
On running the code  I get: 

string(2) "00"
string(4) "5c30"
string(2) "00"

which looks a little strange, I would have expected: 

string(2) "5c"
string(4) "5c5c"
string(2) "5c"