run golangci-lint and apply suggested fixes

logger/datastructures.go

@@ -67,7 +67,7 @@ func (l Level) Short() string {
 	case Error:
 		return "ERRO"
 	default:
-		return fmt.Sprintf("%s", l)
+		return l.String()
 	}
 }
 
@@ -82,7 +82,7 @@ func (l Level) String() string {
 	case Error:
 		return "error"
 	default:
-		return fmt.Sprintf("%s", string(l))
+		return string(l)
 	}
 }
 

logger/logger.go

@@ -66,7 +66,8 @@ func (l *loggerImpl) logInternalError(outlet Outlet, err string) {
 		time.Now(),
 		fields,
 	}
-	l.outlets.GetLoggerErrorOutlet().WriteEntry(entry)
+	// ignore errors at this point (still better than panicking if the error is temporary)
+	_ = l.outlets.GetLoggerErrorOutlet().WriteEntry(entry)
 }
 
 func (l *loggerImpl) log(level Level, msg string) {

logger/stderrlogger.go

@@ -5,10 +5,6 @@ import (
 	"os"
 )
 
-type stderrLogger struct {
-	Logger
-}
-
 type stderrLoggerOutlet struct{}
 
 func (stderrLoggerOutlet) WriteEntry(entry Entry) error {