MDEV-22344: Fix typos in comments

mysql-test/r/type_set.result

@@ -108,7 +108,7 @@ End of 5.0 tests
 # Start of 10.0 tests
 #
 #
-# MDEV-6950 Bad results with joins compating DATE and INT/ENUM/VARCHAR columns
+# MDEV-6950 Bad results with joins comparing DATE and INT/ENUM/VARCHAR columns
 #
 CREATE TABLE t1 (c1 DATE PRIMARY KEY);
 INSERT INTO t1 VALUES ('2001-01-01');

mysql-test/t/type_set.test

@@ -101,7 +101,7 @@ DROP TABLE t1;
 --echo #
 
 --echo #
---echo # MDEV-6950 Bad results with joins compating DATE and INT/ENUM/VARCHAR columns
+--echo # MDEV-6950 Bad results with joins comparing DATE and INT/ENUM/VARCHAR columns
 --echo #
 
 CREATE TABLE t1 (c1 DATE PRIMARY KEY);

mysys/list.c

@@ -14,7 +14,7 @@
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
 
 /*
-  Code for handling dubble-linked lists in C
+  Code for handling doubly linked lists in C
 */
 
 #include "mysys_priv.h"
@@ -22,7 +22,7 @@
 
 
 
-	/* Add a element to start of list */
+	/* Add an element to start of list */
 
 LIST *list_add(LIST *root, LIST *element)
 {