gh-137533:shorten the sentence of this note,maybe its too short : (

Author: Rov-Waff

Doc/library/json.rst

@@ -147,12 +147,9 @@ See :ref:`json-commandline` for detailed documentation.
    default.  Order is only lost if the underlying containers are unordered.
 
 .. note::
-   According to :rfc:`7159`, the keys of all objects in JSON are strings.
-   Under normal circumstances,the encoder of this module
-   will convert the keys of all Python dictionaries into strings as the
-   keys of JSON objects, and the decoder of this module will
-   decode the keys of all JSON objects into strings as the keys
-   of Python dictionaries
+   Per RFC 7159, JSON keys are strings.
+   This module's encoder converts dictionary keys to strings,
+   and its decoder produces dictionaries with string keys.
 
 Basic Usage
 -----------