[d12frosted]

vui-table supports three :border variants at the moment - :ascii, :unicode and nil (i.e. none)

:ascii

  +---------+--------+
  | Summary |        |
  +---------+--------+
  | RMS     | 4.1620 |
  | AVG     | 3.9558 |
  +---------+--------+

:unicode

  ┌─────────┬────────┐
  │ Summary │        │
  ├─────────┼────────┤
  │ RMS     │ 4.1620 │
  │ AVG     │ 3.9558 │
  └─────────┴────────┘

I think there is room for improvement (like use thicker lines for headers in unicode) and I also need to provide a way to override these.