CUPS printer and class names may contain any printable character, except
space, tab, /, or #. (See man lpadmin)
Also important to note: printer and class names are *not* case-
sensitive. myprinter and mYpRiNtEr are exactly the same printer for
CUPS!
A different kind of fish is what an application parsing PPD files may
display as printer-make-and-model information. The PPD keywords
*NickName and *ShortNickName do describe printer models, and do
indeed very often contain spaces. Please do not confuse this with
printername as is allowed for CUPS!
--
gnome-cups-manager creates printers with invalid names
https://launchpad.net/bugs/21882
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