The unified diff viewer has only two command line options:
Table D.3. List of available options
|Path to the unified diff file.
|Activates pipe mode. The unified diff is read from the console input.
Examples (which should be entered on one line):
If you create the diff from another command, you can use TortoiseUDiff to show that diff directly:
svn diff | TortoiseUDiff.exe /u
this also works if you omit the
svn diff | TortoiseUDiff.exe