// order they appear (the order listed here) or the format they present (as
// described in the comments). A colon appears after these items:
// 2009/0123 01:23:23.123123 /a/b/c/d.go:23: message
- Ldate = 1 << iota // the date: 2009/0123
+ Ldate = 1 << iota // the date: 2009/01/23
Ltime // the time: 01:23:23
Lmicroseconds // microsecond resolution: 01:23:23.123123. assumes Ltime.
Llongfile // full file name and line number: /a/b/c/d.go:23