Summary

When the number of characters in:

• a PR description
• plus in the commit messages of the commits belonging to this PR

exceed 2000 characters, users get a 500 error when trying to marge this PR

Steps to Reproduce

Create a PR with a description of more than 2000 characters

or

Create a PR whose description plus commit messages exceed 2000 characters

Then try to merge this PR

Expected Results

The PR gets merged

Actual Results

User gets a 500 error when merging the PR

Workaround

1. Merge the PR via an API call
2. Merge locally and push
3. Edit the PR's description to be less than 2000 characters (if applicable)

Notes

It would be useful if the user would get an error message indicating the issue and also workarounds, instead of a generic 500 error.