-If the source file has its set user ID bit on and the user ID cannot
-be preserved, the set user ID bit is not preserved
-in the copy's permissions.
-If the source file has its set group ID bit on and the group ID cannot
-be preserved, the set group ID bit is not preserved
-in the copy's permissions.
-If the source file has both the set user ID and set group ID bits
-on and either the user ID or group ID cannot be preserved, neither
-the set user ID or set group ID bits are preserved in the copy's
-permissions.
-.Tp Fl r
+If the source file is set user ID or set group ID, and either the user
+ID or the group ID cannot be preserved, the set user ID and set group
+ID bits are not preserved in the copy's permissions.
+.Tp Fl R