Fix wide character support: Halfwidth and fullwidth forms

[akkinoc]

The following code is a Halfwidth (not wide) character.

• FF61 - FF64: Halfwidth CJK punctuation
• FF65 - FF9F: Halfwidth Katakana variants
• FFA0 - FFDC: Halfwidth Hangul variants
• FFE8 - FFEE: Halfwidth symbol variants

refs Halfwidth and Fullwidth Forms http://www.unicode.org/charts/PDF/UFF00.pdf

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old

|    aaa     |         bbb          |         ccc          |
|------------|----------------------|----------------------|
| 12345      | 1234567890           | 1234567890           |
| ｱｲｳｴｵ | ｶﾞｷﾞｸﾞｹﾞｺﾞ | ﾊﾟﾋﾟﾌﾟﾍﾟﾎﾟ |

new

|  aaa  |    bbb     |    ccc     |
|-------|------------|------------|
| 12345 | 1234567890 | 1234567890 |
| ｱｲｳｴｵ | ｶﾞｷﾞｸﾞｹﾞｺﾞ | ﾊﾟﾋﾟﾌﾟﾍﾟﾎﾟ |