Create 'main' test directory and move 't' and 'r' there

mysql-test/main/mysql_delimiter.sql

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+
+# Test default delimiter ;
+select "Test default delimiter ;" as " ";
+select * from t1;
+
+# Test delimiter without argument
+select "Test delimiter without arg" as " ";
+# Nothing should be displayed, error is returned
+delimiter
+delimiter ; # Reset delimiter
+
+# Test delimiter :
+select "Test delimiter :" as " ";
+delimiter :
+select * from t1:
+delimiter ; # Reset delimiter
+
+# Test delimiter ':'
+select "Test delimiter :" as " ";
+delimiter ':'
+select * from t1:
+delimiter ; # Reset delimiter
+
+# Test delimiter :;
+select "Test delimiter :;" as " ";
+delimiter :;
+select * from t1 :;
+delimiter ; # Reset delimiter
+
+## Test delimiter //
+select "Test delimiter //" as " ";
+delimiter //
+select * from t1//
+delimiter ; # Reset delimiter
+
+# Test delimiter 'MySQL'
+select "Test delimiter MySQL" as " ";
+delimiter 'MySQL'
+select * from t1MySQL
+delimiter ; # Reset delimiter
+
+# Test delimiter 'delimiter'(should be allowed according to the code)
+select "Test delimiter delimiter" as " ";
+delimiter delimiter
+select * from t1 delimiter
+delimiter ; # Reset delimiter
+
+#
+# Bug #11523: \d works differently than delimiter
+#
+source ./main/mysql_delimiter_source.sql
+delimiter ; # Reset delimiter
+
+#
+# Bug #19799: delimiter command not working correctly when sourcing a sql file
+#             with Windows style line endings.
+#
+source ./main/mysql_delimiter_19799.sql
+use test//
+show tables//
+delimiter ; # Reset delimiter
+
+#
+# Bug #36244: MySQL CLI doesn't recognize standalone -- as comment
+#             before DELIMITER statement
+#
+--
+DELIMITER ;