message: tweak printImageData debug helper
diff: @@ -74,7 +74,7 @@ export function printImageData(imageData: ImageData, scale = 1, pixelated = fals
  // not supported in Firefox and IE
  img.style.imageRendering = 'pixelated';
  }
  - img.style.position = 'absolute';
  + img.style.position = 'relative';
  img.style.top = '0px';
  img.style.left = '0px';
  img.style.border = 'solid grey';
  