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Clarify the TESTFN argument to `alist-get'

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* lisp/subr.el (alist-get):
Rephrase the initial text to clarify the meaning of the TESTFN argument.
It's an equality predicate, not a look-up function (Bug#35206).

(cherry picked from commit c81465580f)
This commit is contained in:
Mattias Engdegård 2019-04-09 16:56:37 +02:00 • committed by Eli Zaretskii
parent a5da653319
commit 00a2d57adf
1 changed files with 2 additions and 2 deletions
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lisp/subr.el
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@ -752,9 +752,9 @@ Elements of ALIST that are not conses are ignored."
alist)
(defun alist-get (key alist &optional default remove testfn)
"Return the value associated with KEY in ALIST.
"Find the first element of ALIST whose `car' equals KEY and return its `cdr'.
If KEY is not found in ALIST, return DEFAULT.
Use TESTFN to lookup in the alist if non-nil. Otherwise, use `assq'.
Equality with KEY is tested by TESTFN, defaulting to `eq'.
This is a generalized variable suitable for use with `setf'.
When using it to set a value, optional argument REMOVE non-nil