(defun cvs-tree-merge (tree1 tree2)
"Merge tags trees TREE1 and TREE2 into one.
BEWARE: because of stability issues, this is not a symmetric operation."
(defun cvs-tree-merge (tree1 tree2)
"Merge tags trees TREE1 and TREE2 into one.
BEWARE: because of stability issues, this is not a symmetric operation."