Parse file diffs

[ipmb]

They have a changes field that looks like this:

{
  "diff": "--- \n+++ \n@@ -10,7 +10,7 @@\n req-logger = file:/var/log/proj/uwsgi.access.log\n # Prefix all log statements with date formatted as in common log format:\n log-date = [%%d/%%b/%%Y:%%H:%%M:%%S %%z]\n-logger = file:/var/log/proj/uwsgi.error.log\n+logger = file:/var/log/proj/uwsgi.log\n log-slow = 2000\n \n \n"
}