Description:
------------
Hi guys,

Concatenation with some numeric operation results in strange behavior when no parenthesis are used.

$str = "Something: " . (5-2) . " foo\n";
$str2 = "Something : " . 5-2 . " foo\n";


Sorry if it's not a bug, and if I'm wrong...

Test script:
---------------
<?php

$str = "Something: " . (5-2) . " foo\n";
$str2 = "Something : " . 5-2 . " foo\n";
echo $str;
echo $str2;
return

Expected result:
----------------
Something: 3 foo
Something: 3 foo

Actual result:
--------------
Something: 3 foo
-2 foo