Jetbrainsmono: Glyph on U+26C4 should not be here

Created on 17 Jan 2020 · 2Comments · Source: JetBrains/JetBrainsMono

v1.0 has a strange glyph on U+26C4 (SNOWMAN WITHOUT SNOW).

スクリーンショット 0002-01-17 16 42 55

This has two problems.

Unicode defines East Asian Width. The spec txt describes that this codepoint (U+26C4) is “W”, that is, “Wide Character”.
```
...
26C4..26C5;W     # So     [2] SNOWMAN WITHOUT SNOW..SUN BEHIND CLOUD
...
```
Terminal apps, such as Terminal.app and iTerm2, respect this value and draw U+26C4 as a double-width one. So it shows an extra space. It is annoying.
This codepoint is NOT the Private Use Area. We should not use here for this. I suggest we move this glyph to PUA (one is U+E000 .. U+F8FF). This also solves 1.