Currently tab "Files Changed" for PR doesn't show a file name. Could you please print file name?
hm, it seems to me that it does show the file names: https://pagure.io/pagure/pull-request/2732#request_diff
It doesn't show filename if diff has modifications only for 1 file:
https://pagure.io/standard-test-roles/pull-request/77#request_diff
I think this is a duplicate of https://pagure.io/pagure/issue/2266
Thanks for the report though.
Metadata Update from @pingou: - Issue close_status updated to: Duplicate