Fix syntax error on JSON range formatting (#10497)

changelog_unreleased/json/10497.md

@@ -0,0 +1,16 @@
+#### Fix syntax error on JSON range formatting (#10497 by @fisker)
+
+<!-- prettier-ignore -->
+```js
+// Input
+[{ a: 1.0000}, {"b":   2.0000 }]
+//                 ^^^^^^^^^^^ range
+
+// Prettier stable
+SyntaxError: Unexpected token (1:4)
+> 1 | "b":   2.0000
+    |    ^
+
+// Prettier main
+[{ a: 1.0000}, { "b": 2.0 }]
+```