::fixture-ready::
$ nl -ba project/logs/app.log | sed -n '1,8p'
     1	server started
     2	loading config
     3	ERROR missing API_KEY
     4	retry disabled
     5	exit
::exit-code::0
$ grep -n -C 2 'ERROR' project/logs/app.log
1-server started
2-loading config
3:ERROR missing API_KEY
4-retry disabled
5-exit
::exit-code::0