Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Create a webhook on a repository
   • Add the Pull request Modified event
2. On the same repository, open an existing pull request and click on ... > Edit
3. Without making any changes to the pull request, click on Save

Expected Results

The webhook should not be triggered to send the pr:modified event

Actual Results

The webhook sends the pr:modified event even if there were no changes made to the Pull request's title, description, or target branch.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available