title: Why does leaflet.js 1.3.1 differ between unpkg.com and leafletjs.com?
body: <p>I downloaded the latest version of leaflet (1.3.1) from leafletjs.com and noticed that it differs from unpkg.com:  <a href="https://unpkg.com/leaflet@1.3.1/dist/leaflet.js" rel="nofollow noreferrer">https://unpkg.com/leaflet@1.3.1/dist/leaflet.js</a></p>
  
  <p>The second line of leaflet.js is:</p>
  
  <p>unpkg.com:</p>
  
  <pre><code>* Leaflet 1.3.1, a JS library for interactive maps. http://leafletjs.com
  </code></pre>
  
  <p>zip file from leafletjs.com:</p>
  
  <pre><code> * Leaflet 1.3.1+Detached: ba6f97fff8647e724e4dfe66d2ed7da11f908989.ba6f97f, a JS library for interactive maps. http://leafletjs.com
  </code></pre>
  
  <p>Why is that?  I modified one of the leafletjs.com examples to use a local copy of leaflet which I just downloaded.  It didn't work because the link integrity failed, so I found out that the files are different.  Shouldn't they be identical?</p>
  
  <p>I cloned the git repository and check-out tag v1.3.1.  The commit checksum is the same as the one that appears in the zip file:  ba6f97fff8647e724e4dfe66d2ed7da11f908989</p>