cl-copy-treecl-copy-tree is an alias for `copy-tree' in `
cl.el'. (cl-copy-tree TREE &optional VECP) This function is obsolete since 24.3; use `copy-tree' instead. Make a copy of TREE. If TREE is a cons cell, this recursively copies both its car and its cdr. Contrast to `copy-sequence', which copies only along the cdrs. With second argument VECP, this copies vectors as well as conses.