Hello, according to man eqn an ellipsis of three subsequent dots will be replaced by a real ellipsis, whereas to get three centered dots one should use cdots. However when I enter ... I get cdots and I wouldn't know how to get a real ellipsis, since there does not appear to be an ellipsis glyph in groff_char either (typing "..." will insert three mal-aligned dots).
Can anyone shed light on this? Thanks