Fix doc

velox/docs/functions/spark/json.rst

@@ -7,13 +7,12 @@ JSON Format
 
 JSON is a language-independent data format that represents data as
 human-readable text. A JSON text can represent a number, a boolean, a
-string, an array, an object, or a null, with slightly different grammar.
-For instance, a JSON text representing a string must escape all characters
-and enclose the string in double quotes, such as ``"123\n"``, whereas a JSON
-text representing a number does not need to, such as ``123``. A JSON text
-representing an array must enclose the array elements in square brackets,
-such as ``[1,2,3]``. More detailed grammar can be found in
-`this JSON introduction`_.
+string, an array, an object, or a null. A JSON text representing a string
+must escape all characters and enclose the string in double quotes, e.g.,
+``"123\n"``, whereas a JSON text representing a number does not need to,
+e.g., ``123``. A JSON text representing an array must enclose the array
+elements in square brackets, e.g., ``[1,2,3]``. More detailed grammar can
+be found in `this JSON introduction`_.
 
 .. _this JSON introduction: https://www.json.org