<p dir="auto">In webpack 4, I notice duplicate license comments in the bundle. I think it will be nice to show only once instead of multiple times. And also this makes the bundle size bigger.</p>
<p dir="auto">Picture below is jQuery.<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/2662413/45751055-61850500-bc3b-11e8-8741-f7906c78a161.PNG"><img src="https://user-images.githubusercontent.com/2662413/45751055-61850500-bc3b-11e8-8741-f7906c78a161.PNG" alt="duplicate" style="max-width: 100%;"></a></p>
<p dir="auto">Picture below is CKEditor 5 Custom Build.<br>
<a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/2662413/45750854-86c54380-bc3a-11e8-96cd-8d1dbb80a595.PNG"><img src="https://user-images.githubusercontent.com/2662413/45750854-86c54380-bc3a-11e8-96cd-8d1dbb80a595.PNG" alt="multiple license" style="max-width: 100%;"></a></p>
<p dir="auto">Publish <a href="https://github.com/webpack/docs/wiki/how-to-write-a-loader">some guidelines</a> for loaders.</p>