Almost half of all completions available from the completion list of
`customize-group' are not group names, but option names. This is due
to the completion predicate in `customize-group':
(lambda (symbol)
(or (get symbol 'custom-loads)
(get symbol 'custom-group)))
It assumes that a group symbol has either `custom-loads' or `custom-group'
property. Whereas `custom-group' is a reliable way to identify symbols
of customization groups, `custom-loads' is not, because non-groups symbols
have it too, since `custom-autoload' in loaddefs.el puts this property
on autoload options. But `custom-autoload' also puts another property
`custom-autoload' on autoload options, and group symbols don't have
this property. So how about filtering out symbols with
`custom-autoload' property? This should leave only already loaded
groups and also groups with `custom-loads' property from cus-load.el:
(lambda (symbol)
(or (and (get symbol 'custom-loads)
(not (get symbol 'custom-autoload)))
(get symbol 'custom-group)))
However, it is possible that there is a group in cus-load.el with the
same name as autoload option in loaddefs.el. In this case, this name
won't get into the completion list. Maybe a better solution is to put
`custom-group' property explicitly on every group symbol in cus-load.el?
--
Juri Linkov
http://www.jurta.org/emacs/
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