#16333: use (",", ": ") as default separator when indent is specified to avoid trailing whitespace. Patch by Serhiy Storchaka.
diff --git a/Doc/library/json.rst b/Doc/library/json.rst
index f9547cb..25a3358 100644
--- a/Doc/library/json.rst
+++ b/Doc/library/json.rst
@@ -155,9 +155,13 @@
.. versionchanged:: 3.2
Allow strings for *indent* in addition to integers.
- If *separators* is an ``(item_separator, dict_separator)`` tuple, then it
- will be used instead of the default ``(', ', ': ')`` separators. ``(',',
- ':')`` is the most compact JSON representation.
+ If specified, *separators* should be an ``(item_separator, key_separator)``
+ tuple. The default is ``(', ', ': ')`` if *indent* is ``None`` and
+ ``(',', ': ')`` otherwise. To get the most compact JSON representation,
+ you should specify ``(',', ':')`` to eliminate whitespace.
+
+ .. versionchanged:: 3.4
+ Use ``(',', ': ')`` as default if *indent* is not ``None``.
*default(obj)* is a function that should return a serializable version of
*obj* or raise :exc:`TypeError`. The default simply raises :exc:`TypeError`.
@@ -394,8 +398,12 @@
Allow strings for *indent* in addition to integers.
If specified, *separators* should be an ``(item_separator, key_separator)``
- tuple. The default is ``(', ', ': ')``. To get the most compact JSON
- representation, you should specify ``(',', ':')`` to eliminate whitespace.
+ tuple. The default is ``(', ', ': ')`` if *indent* is ``None`` and
+ ``(',', ': ')`` otherwise. To get the most compact JSON representation,
+ you should specify ``(',', ':')`` to eliminate whitespace.
+
+ .. versionchanged:: 3.4
+ Use ``(',', ': ')`` as default if *indent* is not ``None``.
If specified, *default* is a function that gets called for objects that can't
otherwise be serialized. It should return a JSON encodable version of the