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doc: Replace 'specification->package+output' with 'specifications->packages'. 

'(map specification->package+output specs)' doesn't work due to
'specification->package+output' will return multiple values.

* doc/guix.texi (Using the Configuration System): Replace
'specification->package+output' with 'specifications->packages'.

Change-Id: I443771327a2ef5ae5e7dddd9785f1eef4200e898
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宋文武 2024-05-26 08:23:08 +08:00
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@ -17258,10 +17258,10 @@ version:
%base-packages)))
@end lisp
@findex specification->package+output
@findex specifications->packages
When a package has more than one output it can be a challenge to refer to a
specific output instead of just to the standard @code{out} output. For these
situations one can use the @code{specification->package+output} procedure from
situations one can use the @code{specifications->packages} procedure from
the @code{(gnu packages)} module. For example:
@lisp
@ -17269,8 +17269,8 @@ the @code{(gnu packages)} module. For example:
(operating-system
;; ...
(packages (append (map specification->package+output
'("git" "git:send-email"))
(packages (append (specifications->packages
'("git" "git:send-email"))
%base-packages)))
@end lisp