rcs merge [options] file (or “rcsmerge” instead of “rcs merge”)
The rcsmerge command incorporates the changes between two revisions of an RCS file into the corresponding working file.
-A-E-ePassed to the diff3 command.
The default if none are specified is -E.
With -e, suppress warnings on conflict.
The -A style generates the most verbose output.
See Invoking diff3 in The GNU Diffutils Manual.
-p[rev]Write to stdout instead of overwriting the working file.
-q[rev]See Misc common options.
-rrev(one or two times) specify a revision.
One or two revisions must be specified (using -p, -q, -r). If only one is specified, the second revision defaults to the latest revision on the default branch.
-ksubst-V-Vn-xsuffSee Misc common options.
-zzoneSee Date option.
These options have no effect, and are included solely for consistency
with other comamnds (see Environment): -T.