Improve document

Signed-off-by: chirsz-ever <[email protected]>

Author: chirsz-ever

README.md

@@ -1767,11 +1767,11 @@ However, you can pass set parameter `ignore_comments` to true in the `parse` fun
 
 ### Trailing Commas
 
-Trailing commas in arrays and objects are alse not part of the [JSON specification](https://tools.ietf.org/html/rfc8259), and this library does not support it by default.
+Trailing commas in arrays and objects are also not part of the [JSON specification](https://tools.ietf.org/html/rfc8259), and this library does not support it by default.
 
-Like comments, you can pass set parameter `allow_trailing_commas` to true in the `parse` function to allow trailing commas in arrays and objects. Trailing commas will then be ignored.
+Like comments, you can pass set parameter `allow_trailing_commas` to true in the `parse` function to allow trailing commas in arrays and objects. Trailing commas will then be ignored. Note that a single comma as the only content of the array or object (`[,]` or `{,}`) is not allowed.
 
-Note that this library does not add trailing commas when serializing JSON data. Even when you set `allow_trailing_commas` to true, `{,}` and `[,]` are not valid JSON.
+This library does not add trailing commas when serializing JSON data.
 
 ### Order of object keys
 

docs/mkdocs/docs/features/trailing_commas.md

@@ -2,9 +2,9 @@
 
 Like comments, this library does not support trailing commas in arrays and objects *by default*.
 
-You can pass set parameter `allow_trailing_commas` to `#!c true` in the parse function to allow trailing commas in arrays and objects. Trailing commas are ignored during parsing.
+You can pass set parameter `allow_trailing_commas` to `#!cpp true` in the parse function to allow trailing commas in arrays and objects. Trailing commas are ignored during parsing. Note that a single comma as the only content of the array or object (`[,]` or `{,}`) is not allowed.
 
-Note that this library does not add trailing commas when serializing JSON data. Even when you set `allow_trailing_commas` to true, `{,}` and `[,]` are not valid JSON.
+This library does not add trailing commas when serializing JSON data.
 
 !!! example
 
@@ -69,9 +69,8 @@ Note that this library does not add trailing commas when serializing JSON data.
     Output:
 
     ```
-    [json.exception.parse_error.101] parse error at line 3, column 9:
-    syntax error while parsing object key - invalid literal;
-    last read: '<U+000A>    {<U+000A>        /'; expected string literal
+    [json.exception.parse_error.101] parse error at line 11, column 13:
+    syntax error while parsing value - unexpected ']'; expected '[', '{', or a literal
     ```
 
     ```json