[Bug] Wrong caret moving and block merging when there are spaces at block edge

[hata6502]

Wrong caret moving and block merging when there are spaces at block edge.

Steps to reproduce:
Please see GIF animations.

Expected behavior:
Don't ignore spaces at block edge when caret moving and block merging.

Screenshots:

• Wrong caret moving in right direction
  

• Wrong caret moving in left direction
  

• Wrong block merging
  

Device, Browser, OS: PC, Chrome, Ubuntu 20.04

Editor.js version: 2.19.0

Plugins you use with their versions: none