in galog_stderr.go [45:58]
func NewStderrBackend(writer io.Writer) *StderrBackend {
res := &StderrBackend{
backendID: "log-backend,stderr",
config: newBackendConfig(defaultStderrQueueSize),
writer: writer,
}
res.config.SetFormat(ErrorLevel,
`{{.When.Format "2006-01-02T15:04:05.0000Z07:00"}} {{if .Prefix}} {{.Prefix}}: {{end}}[{{.Level}}]: {{.Message}}`)
res.config.SetFormat(DebugLevel,
`{{.When.Format "2006-01-02T15:04:05.0000Z07:00"}} {{if .Prefix}} {{.Prefix}}: {{end}}[{{.Level}}]: ({{.File}}:{{.Line}}) {{.Message}}`)
return res
}