rcs: merge

 
 2.5 Invoking merge
 ==================
 
      merge [options] receiving-sibling parent other-sibling
 
 The merge command combines the differences between a the parent and the
 other sibling, and the differences between the parent and the receiving
 sibling.  It writes the result to the receiving sibling.
 
 -A
 -E
 -e
      Use ‘diff3’ ‘-A’, ‘-E’ (default), or ‘-e’, respectively.
 
 -p
      Write to standard output instead of overwriting RECEIVING-SIBLING.
 
 -q
      ⇒Misc common options.  Suppress conflict warnings.
 
 -L LABEL
      (up to three times) Specify the conflict labels for
      RECEIVING-SIBLING, PARENT and OTHER-SIBLING, respectively.
 
 -V
      Note that ‘-VN’ is _not_ a valid option for merge, in contrast to
      most other RCS commands (⇒Misc common options).