When attaching a file whose name contains quotes, filename before last quote is cut off in display

Support topic: http://www.phpbb.com/community/viewtopic.php?f=46&t=2091805

When any user wants to attach a file with name like ''Mark's file'' or other using of combination of signs ''abc's file'', the final attachment's name showed in forum is only '' 's file'', the letters in front apostrophe are ignored.

I tested on my board with a filename containing single and double quotes:

Original filename:

test ' yy " xx.txt

Displayed filename:

" xx.txt

Seems like all text before the last single or double quote is killed off.