Update JSON parser test and docs

* test/src/json-tests.el (json-parse-string/object):
Duplicated object keys are now retained in alist and plist output.
* etc/NEWS: Mention it.

1 files changed, 9 insertions, 1 deletions

diff --git a/etc/NEWS b/etc/NEWS
index e575fc2936e..4b0f148dc5d 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1721,8 +1721,16 @@ Use a float value for the first argument instead.
 Instead, use 'eshell-process-wait-time', which supports floating-point
 values.
 
+** JSON
+
+---
+*** The parser keeps duplicated object keys in alist and plist output.
+A JSON object such as '{"a":1,"a":2}' will now be translated into the
+Lisp values '((a . 1) (a . 2))' or '(:a 1 :a 2)' if alist or plist
+object types are requested.
+
 ---
-** The JSON parser sometimes signals different types of errors.
+*** The parser sometimes signals different types of errors.
 It will now signal 'json-utf8-decode-error' for inputs that are not
 correctly UTF-8 encoded.