fix doc in tokener header file

json_tokener.h

@@ -136,14 +136,14 @@ extern void json_tokener_set_flags(struct json_tokener *tok, int flags);
  * it can also be a string, number or boolean value.
  *
  * A partial JSON string can be parsed.  If the parsing is incomplete,
- * NULL will be returned and json_tokener_get_error() will be return
+ * NULL will be returned and json_tokener_get_error() will return
  * json_tokener_continue.
  * json_tokener_parse_ex() can then be called with additional bytes in str
  * to continue the parsing.
  *
- * If json_tokener_parse_ex() returns NULL and the error anything other than
+ * If json_tokener_parse_ex() returns NULL and the error is anything other than
  * json_tokener_continue, a fatal error has occurred and parsing must be
- * halted.  Then tok object must not be re-used until json_tokener_reset() is
+ * halted.  Then, the tok object must not be reused until json_tokener_reset() is
  * called.
  *
  * When a valid JSON value is parsed, a non-NULL json_object will be