Number of Revisions specified:
|None||Working file against latest revision|
|One||Working file against specified revision|
|Two||One revision against the other|
rcsdiff accepts the standard options
-q, -V, and -x, as well as
diff_options, which can be any valid diff option.
rcsdiff exits with a status of 0 (no differences), 1 (some differences),
or 2 (unknown problem).
When comparing revisions, expand keywords using style
(See co for values of
R1 in the comparison.
R2 in the comparison.
R1 must also be specified.)