I have a project in a GIT repository which I manage through Source Tree. One file only has ceased to display a diff in the right hand pane even though it is shown as changed in the file/status tab and from the git command line. Instead the diff pane has the file name with a green icon with a tick in it. If I open the file and re-save it forcing UTF-8 (As there has been a reported bug about Unicode 16 files) with a text editor, the file is shown with a yellow icon with "Open before" and "Open after" buttons. I simply want source tree to display the diff information for this file again