$ fossil add hello.txt<br>
ADDED  hello.txt<br>
<br>
$ fossil commit -m 'added hello.txt'<br>
New_Version: b190756273e71d2d4f13b88b55b18ad394bb3153<br>
<br>
# No output because hello.txt has not changed.<br>
$ fossil diff<br>
<br>
# Some output when hello.txt is specified by itself making<br>
# it hard to know in general if there is a difference or not.<br>
$ fossil diff hello.txt <br>
--- hello.txt<br>
+++ hello.txt<br>
<br>
# Back to no output when multiple files are specified.<br>
$ fossil diff hello.txt hello.txt <br>
<br>