tools/sizes.py: Change Unicode box-drawing chars to that of double version #8573
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…rsion Due to historical circumstances, some of light/heavy version of Unicode box-drawing chars may have twice width of others (aka. "Zen-Kaku" in Japanese, means full-square), eg. All of '─'(U+2500), '│'(U+2502), '└'(U+2514) and '├'(U+251C) correspond to that in Windows Japanese fonts and locale. Double versions, '═'(U+2550), '║'(U+2551), '╚'(U+255A) and '╠'(U+2560) are not like that. (See [Box Drawing, The Unicode Standard](https://www.unicode.org/charts/PDF/U2500.pdf))
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Due to historical circumstances, some of light/heavy version of Unicode box-drawing chars may have twice width of others (aka. "Zen-Kaku" in Japanese, means full-square), eg. All of '─'(U+2500), '│'(U+2502), '└'(U+2514) and '├'(U+251C) correspond to that in Windows Japanese fonts and locale.
Double versions, '═'(U+2550), '║'(U+2551), '╚'(U+255A) and '╠'(U+2560) are not like that.
(See Box Drawing, The Unicode Standard)