title: After github "merge pull request " action, all commits from the feature branch and a new merge commit appearing on the develop branch
body: <p>Develop branch looks like</p>
  
  <pre><code>Develop
    |- Commit 1
  </code></pre>
  
  <p>Create feature branch off develop git checkout -b feature origin/develop</p>
  
  <pre><code>Feature 
    |- Commit 1
    |- Commit 2  (New commit)
    |- Commit 3  (New Commit)
  </code></pre>
  
  <p>After that created a PR with two commits.
  Use a GitHub Merge pull request button to merge
  After merging the commit history of Develop looks like</p>
  
  <pre><code>Develop
    |- Commit 1
    |- Commit 2
    |- Commit 3
    |- Merged pull request #1 from user/branch/name
  </code></pre>
  
  <p>Any reason why commit 2 &amp; 3 appearing in the history of Develop</p>