[clisp-list] How to add to custom:*browsers*

[NickC <rep...@no...>]

A beginner's question, but I can't figure out the syntax to add Opera 
browser to custom:*browsers*.  I tried:
(append custom:*browsers* (list :OPERA "opera" "-remote" "openURL(~a,new-
tab)"))
but this gives each element as an individual entry instead of the list 
surrounded by parentheses.

For example, I want this:
...other entries...) (:OPERA "opera" "-remote" "openURL(~a,new-tab)")
but get this:
...other entries...) :OPERA "opera" "-remote" "openURL(~a,new-tab)"

Thanks,
-- 
NickC