Fix TabError for Python 3
Fix TabError for Python 3

Was split out of #1885...
```
./src/Tools/ArchiveNameFromVersionHeader.py:41:34: E999 TabError: inconsistent use of tabs and spaces in indentation
	version['FCRepositoryHash'] = SHA
                                 ^
```
Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master