Output layout is broken by multibyte character

[userlocalhost]

Output layout is broken by multibyte character

Hi, all

Thank you for providing this software. I love to use this.
And I have a feature request for multibyte character.

When I input a context which has multibyte character as below,

rows = []
rows << ['One', 1]
rows << ['Ｔｗｏ', 2]
table = Terminal::Table.new :rows => rows

puts table

the separation character of | is shifted like following.

+-----+---+
| One | 1 |
| Ｔｗｏ | 2 |
+-----+---+