Adding a border to a paragraph causes extra line breaks

[b0o]

With no border, spacing is correct:

local n = require 'nui-components'

local renderer = n.create_renderer {
  width = 64,
  height = 20,
}

renderer:render(
  n.paragraph {
    lines = {
      n.line(n.text('Foo', 'Keyword')),
      n.line(n.text('Bar', 'Keyword')),
      n.line(n.text('Qux', 'Keyword')),
    },
  }
)

---

When adding a border, we get extra blank lines. I think there is an issue with width calculation causing the lines to wrap.

local n = require 'nui-components'

local renderer = n.create_renderer {
  width = 64,
  height = 20,
}

renderer:render(
  n.paragraph {
    border_style = 'rounded',
    lines = {
      n.line(n.text('Foo', 'Keyword')),
      n.line(n.text('Bar', 'Keyword')),
      n.line(n.text('Qux', 'Keyword')),
    },
  }
)

By doing :setlocal list and :setlocal listchars=trail:~, it appears the line is padded with spaces, but there are 2 too many:

Also, when truncate is set to true, the issue does not occur.