Squares ▪︎▫︎◻︎◼︎ and arrows ◀︎▶︎ reported with width 2 but only takes up 1 space

[erf]

Squares ▪︎▫︎◻︎◼︎ and arrows ◀︎▶︎ reported with width 2 but only takes up 1 space in the terminal.

There are probably more cases like this. i Pressed the "Character viewer" on my mac and went to "Bullets and stars" to find these.

[hyiso]

Emoji Regex related issue could be fired to emoji_regex.
string_width@0.1.4 use a copy of emoji_regex.dart temporarily and will remove it later

[erf]

I see you replace all emoji characters with two empty spaces, is that correct though for all emoji characters? The square and arrow symbols i mentioned only took up one space, so if these are emojis as you suggest, then they would take up two spaces, but that would be wrong.

[erf]

I wrote a test and found the Unicode character for the black square, which is in fact part of the emoji_regex and is replaced with two empty chars, gives 2 in width, but in the terminals i've tested in it only takes up one column space.

import 'package:string_width/string_width.dart';
import 'package:test/test.dart';

void main() {
  test('measure string width of ▪', () {
    expect(stringWidth('▪'), 1);
  });
}