Issue Summary

This is reproducible on Data Center: yes

Steps to Reproduce

1. Commit a filename with "?", such as special?char.txt
2. Modify the file in a new branch
3. Create a pull request between the branches

Expected Results

The pull request shows the diff

Actual Results

The pull request is empty:

Note that comparing the two branches on the compare page will show the correct diff (for Bitbucket version 7.21)

Workaround

The file must be renamed in the new branch - the PR will then be updated and show the correct diff:
For example:

git checkout branch1
git mv special\?char.txt special-char.txt
git add .
git commit -m "change filename"
git push

The PR should now show the diff