ref(promslog): use string formatting modifier in error messages

Signed-off-by: TJ Hoplock <[email protected]>

Author: tjhop

promslog/slog.go

@@ -115,7 +115,7 @@ func (l *AllowedLevel) Set(s string) error {
 		l.lvl.Set(slog.LevelError)
 		callerAddFunc = false
 	default:
-		return fmt.Errorf("unrecognized log level %q", s)
+		return fmt.Errorf("unrecognized log level %s", s)
 	}
 	l.s = s
 	return nil
@@ -136,7 +136,7 @@ func (f *AllowedFormat) Set(s string) error {
 	case "logfmt", "json":
 		f.s = s
 	default:
-		return fmt.Errorf("unrecognized log format %q", s)
+		return fmt.Errorf("unrecognized log format %s", s)
 	}
 	return nil
 }