(rcs.info)rcsdiff

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2.8 Invoking rcsdiff
====================

     rcs diff [options] file …
     (or “rcsdiff” instead of “rcs diff”)

The rcsdiff command runs diff to compare two revisions in an RCS file.
Note: (diff)Invoking diff.

‘-rREV’
     (zero, one, or two times) Name a revision.  If given two revisions
     (‘-rREV1 -rREV2’), compare those revisions.  If given only one
     revision (‘-rREV’), compare the working file with it.  If given no
     revisions, compare the working file with the latest revision on the
     default branch.

‘-kSUBST’
     Note: Substitution mode option.

‘-q’
     Note: Misc common options.

‘-V’
‘-VN’
‘-xSUFF’
     Note: Misc common options.

‘-zZONE’
     Note: Date option.

These options have no effect, and are included solely for consistency
with other comamnds (Note: Environment): ‘-T’.

Additionally, the following options (and their argument, if any) are
passed to the underlying diff command:

     -0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -B, -C, -D, -F, -H, -I,
     -L, -U, -W, -a, -b, -c, -d, -e, -f, -h, -i, -n, -p, -t, -u, -w, -y,
     long options (that start with "--")

(Not all of these options are meaningful.)