* lisp/international/fontset.el (create-fontset-from-fontset-spec):
Clarify what the optional part is (bug#18686).
&optional _style-variant _noerror)
"Create a fontset from fontset specification string FONTSET-SPEC.
FONTSET-SPEC is a string of the format:
- FONTSET-NAME,SCRIPT-NAME0:FONT-NAME0,SCRIPT-NAME1:FONT-NAME1, ...
+ FONTSET-NAME[,SCRIPT-NAME0:FONT-NAME0,SCRIPT-NAME1:FONT-NAME1] ...
Any number of SPACE, TAB, and NEWLINE can be put before and after commas.
When a frame uses the fontset as the `font' parameter, the frame's