message: testlog: Don't excessivly pad on long file names
diff: @@ -146,7 +146,7 @@ func (l *logger) flush() {
  l.t.Helper()
  // 2 frame skip for flush() + public logger fn
  decorationLen := estimateInfoLen(2)
  - padding := 20
  + padding := 0
  if decorationLen <= 25 {
  padding = 25 - decorationLen
  }
  