Merge pull request rails#51529 from p8/guides/properyl-escape-sql-comments-in-examples

Use SQL comments for SQL code blocks in guides [ci-skip]

Author: p8

guides/source/active_record_basics.md

@@ -465,16 +465,16 @@ book = Book.take
 The above results in the following SQL:
 
 ```sql
-# Book.all
+-- Book.all
 SELECT "books".* FROM "books"
 
-# Book.first
+-- Book.first
 SELECT "books".* FROM "books" ORDER BY "books"."id" ASC LIMIT ?  [["LIMIT", 1]]
 
-# Book.last
+-- Book.last
 SELECT "books".* FROM "books" ORDER BY "books"."id" DESC LIMIT ?  [["LIMIT", 1]]
 
-# Book.take
+-- Book.take
 SELECT "books".* FROM "books" LIMIT ?  [["LIMIT", 1]]
 ```