-u::
Synonym for "-p".
--r::
- Look recursively in subdirectories; only used by "git-diff-tree";
- other diff commands always work recursively.
-
-z::
\0 line termination on output
<orderfile>, which has one shell glob pattern per line.
-R::
- Swap two inputs; that is, show differences from cache or
+ Swap two inputs; that is, show differences from index or
on-disk file to tree contents.
For more detailed explanation on these common options, see also