rcs: rcsdiff

 
 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.
 ⇒(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
      ⇒Substitution mode option.
 
 -q
      ⇒Misc common options.
 
 -V
 -VN
 -xSUFF
      ⇒Misc common options.
 
 -zZONE
      ⇒Date option.
 
 These options have no effect, and are included solely for consistency
 with other commands (⇒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.)