[ci skip] Improve phrasing on #explain pretty printing.

guides/source/active_record_querying.md

@@ -1787,8 +1787,9 @@ EXPLAIN for: SELECT `users`.* FROM `users` INNER JOIN `articles` ON `articles`.`
 
 under MySQL.
 
-Active Record performs a pretty printing that emulates the one of the database
-shells. So, the same query running with the PostgreSQL adapter would yield instead
+Active Record performs a pretty printing that emulates that of the
+corresponding database shell. So, the same query running with the
+PostgreSQL adapter would yield instead
 
 ```
 EXPLAIN for: SELECT "users".* FROM "users" INNER JOIN "articles" ON "articles"."user_id" = "users"."id" WHERE "users"."id" = 1