[Issue 7054] format() aligns using code units instead of graphemes

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=7054

hsteoh at quickfur.ath.cx changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #16 from hsteoh at quickfur.ath.cx ---
There still remains the following cases that need to be handled:

- Zero-width characters such as U+200B should not add to the width of the
string;

- Wide / Full-width characters as defined by Unicode TR11 (EastAsianWidth.txt)
should occupy 2 spaces per character, as this is what is done in many monospace
terminal applications;

- Hangul Jamo syllables, while correctly segmented as single graphemes by
graphemeStride, are designated as wide characters, and thus should occupy 2
spaces per grapheme (note that there can be multiple dchars per Jamo grapheme).

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