### Summary Currently when PR is merged with _Remove source branch_ enabled, the authorship of the source branch removal is currently set to the user who merged the MR. This is very confusing. It should show the user who merged the MR, not the one who originally submitted it. ### Steps to reproduce 1. Open MR with user Foo from branch test-removal 2. Check the _Remove source branch_ checkbox 3. Merge with user Bar ### What is the current *bug* behavior? Activity will show: > Foo deleted branch test-removal at Some / Project ### What is the expected *correct* behavior? Activity should show: > Bar deleted branch test-removal at Some / Project GitLab 10.5.2.