[Bug 2129399] Postscript standard symbol font is not looked up correctly

https://bugzilla.redhat.com/show_bug.cgi?id=2129399

--- Comment #27 from Akira TAGOH  ---
That looks like a strong claim. "Symbol" font won't be picked up when someone
has the real "Symbol" font installed. in this case, "default" would be better
choice instead of "prefer".
If DejaVu Sans is better substitute font for Symbol, that should works then.