Space bar does not work on Korean

[Me0wzz]

Short description

Describe the bug in a short but concise way.
Space bar does not work on Korean.
English works fine.

Steps to reproduce

1. Use Korean on Florisboard beta 0.4.0-alpha
2. Type "ㄱ" + " " + "ㄴ"
   Expected Behavior: ㄱ ㄴ
   Actual Behavior ㄱㄴ

Environment information

• FlorisBoard Version: 0.4.0-alpha
• Install Source: F-Droid
• Device: Pixel 6
• Android: 12.1 Stock

[patrickgold]

Seems to be an issue with the HangulUnicode composer. Space bar itself is fine and not effected, but the space gets basically "eaten" by the composer mentioned. Adding to the list of keyboard logic issues.

@Hayleia only if you want and have a bit of spare time, could you have a look into it? (as you implemented this composer and thus may notice the issue much easier)

[Hayleia]

Seems like a more general issue. In Vietnamese with Telex too, when typing "e"+" "+"e" you get "ee". So it's probably not a problem in individual composers.

[patrickgold]

Thanks Hayleia for the hint, this caused to to search the area I changed when I added the auto-spacing feature and indeed I accidentally forgot to check if the space should be actually deleted or not. For languages with the Appender this was never a problem because the composers toRead returned 0, but for languages like Korean this returns a positive integer and thus with the missing check causing the logic to believe there is a space to remove.

Above commit/PR contains the one-liner fix, if you want you can try out the fix, at least on my side I couldn't reproduce this issue at all anymore. Will be released in 0.4.0-alpha02.