non-functional cleanup, clarifying CONVERT_IF_BIGGER_TO_BLOB

mysql-test/r/ctype_utf16.result

@@ -1140,6 +1140,14 @@ id	l
 a	512
 Warnings:
 Warning	1260	Row 1 was cut by GROUP_CONCAT()
+SELECT id, CHAR_LENGTH(GROUP_CONCAT(body)) AS l
+FROM (SELECT 'a' AS id, REPEAT('foo bar', 100) AS body
+UNION ALL
+SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1;
+id	l
+a	512
+Warnings:
+Warning	1260	Row 1 was cut by GROUP_CONCAT()
 #
 # End of 5.5 tests
 #

mysql-test/r/ctype_utf8.result

@@ -5055,6 +5055,14 @@ id	l
 a	1024
 Warnings:
 Warning	1260	Row 2 was cut by GROUP_CONCAT()
+SELECT id, CHAR_LENGTH(GROUP_CONCAT(body)) AS l
+FROM (SELECT 'a' AS id, REPEAT('foo bar', 100) AS body
+UNION ALL
+SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1;
+id	l
+a	1024
+Warnings:
+Warning	1260	Row 2 was cut by GROUP_CONCAT()
 #
 # End of 5.5 tests
 #

mysql-test/t/ctype_utf16.test

@@ -777,6 +777,10 @@ SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1
 GROUP BY id
 ORDER BY l DESC;
 
+SELECT id, CHAR_LENGTH(GROUP_CONCAT(body)) AS l
+FROM (SELECT 'a' AS id, REPEAT('foo bar', 100) AS body
+UNION ALL
+SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1;
 
 #
 ## TODO: add tests for all engines

mysql-test/t/ctype_utf8.test

@@ -1590,6 +1590,11 @@ SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1
 GROUP BY id
 ORDER BY l DESC;
 
+SELECT id, CHAR_LENGTH(GROUP_CONCAT(body)) AS l
+FROM (SELECT 'a' AS id, REPEAT('foo bar', 100) AS body
+UNION ALL
+SELECT 'a' AS id, REPEAT('bla bla', 100) AS body) t1;
+
 --echo #
 --echo # End of 5.5 tests
 --echo #

mysql-test/t/func_gconcat.test

@@ -375,7 +375,7 @@ select group_concat('x') UNION ALL select 1;
 drop table t1;
 
 #
-# Bug #12863 : missing separators after first empty cancatanated elements
+# Bug #12863 : missing separators after first empty concatenated elements
 #
 
 CREATE TABLE t1 (id int, a varchar(9));