Great feature in adrci for searching in the alert log

A potentially very timesaving feature in Oracle's adrci is the ability to search in the alert log for specific text, as I had to do to find when a specific parameter was set:

adrci

 ADRCI: Release 11.2.0.4.0 - Production on On Jun 11 12:03:34 2014

 Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

 ADR base = "/u01/oracle/admin/proddb01/diagnostic"
 adrci> show homes
 ADR Homes:
 diag/rdbms/proddb01/proddb01
 adrci> show alert -p "message_text like '%event%'"

 ADR Home = /u01/oracle/admin/proddb01/diagnostic/diag/rdbms/proddb01/proddb01:
 *************************************************************************
 Output the results to file: /tmp/alert_3343326_1_proddb01_1.ado
 "/tmp/alert_3343326_1_proddb01_1.ado" 44 lines, 2408 characters
 2013-08-25 14:35:46.344000 +02:00
 One of the following events caused this:
 2014-01-02 10:56:34.311000 +01:00
 OS Pid: 8455160 executed alter system set events '10852 trace name context forever, level 16384'
 2014-01-02 10:56:47.555000 +01:00
 ALTER SYSTEM SET event='10852 trace name context forever, level 16384' SCOPE=SPFILE;
 2014-01-10 00:43:02.945000 +01:00
   event                    = "10852 trace name context forever, level 16384"
 2014-01-31 19:32:59.471000 +01:00
   event                    = "10852 trace name context forever, level 16384"
 2014-02-01 09:12:59.653000 +01:00
   event                    = "10852 trace name context forever, level 16384"
 CLOSE: Active sessions prevent database close operation
 2014-02-01 18:10:54.100000 +01:00
   event                    = "10852 trace name context forever, level 16384"
 2014-06-10 19:38:42.536000 +02:00
 ALTER SYSTEM SET event='10852 trace name context forever, level 16384 off' SCOPE=SPFILE;
 2014-06-10 19:43:12.770000 +02:00
   event                    = "10852 trace name context off"

Without much effort I was able to find that the parameter was set 02.01.2014, and switched off 10.06.2014.