MDEV-8032 [PATCH] audit plugin - csv output broken.

   Symbols like TAB or NEWLINE should be escaped, which was
        forgotten in one place.

Author: Alexey Botchkov

mysql-test/suite/plugins/r/server_audit.result

@@ -45,6 +45,11 @@ id
 2
 alter table t1 rename renamed_t1;
 set global server_audit_events='connect,query';
+select 1,
+2,
+3;
+1	2	3
+1	2	3
 insert into t2 values (1), (2);
 select * from t2;
 id
@@ -244,6 +249,7 @@ TIME,HOSTNAME,root,localhost,ID,ID,ALTER,test,t1,
 TIME,HOSTNAME,root,localhost,ID,ID,RENAME,test,t1|test.renamed_t1,
 TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'alter table t1 rename renamed_t1',0
 TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'set global server_audit_events=\'connect,query\'',0
+TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'select 1, 2, 3',0
 TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'insert into t2 values (1), (2)',0
 TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'select * from t2',0
 TIME,HOSTNAME,root,localhost,ID,ID,QUERY,test,'select * from t_doesnt_exist',ID

mysql-test/suite/plugins/t/server_audit.test

@@ -35,6 +35,9 @@ insert into t2 values (1), (2);
 select * from t2;
 alter table t1 rename renamed_t1;
 set global server_audit_events='connect,query';
+select 1,
+        2,
+        3;
 insert into t2 values (1), (2);
 select * from t2;
 --error ER_NO_SUCH_TABLE

plugin/server_audit/server_audit.c

@@ -1118,6 +1118,8 @@ static size_t escape_string(const char *str, unsigned int len,
       *(result++)= '\\';
       *(result++)= '\\';
     }
+    else if (is_space(*str))
+      *(result++)= ' ';
     else
       *(result++)= *str;
     str++;