Fix white space detection

[JasperSurmont]

I noticed the white space detection was applying too little. This was happening because:

• We want to add a space whenever the x position (left) of the current symbol is greater than the end x position (right) of the previous symbol
• The cx variable contains the width of the previous symbol
• The x variable contains the x position + the width of the previous symbol
• In the if check, we add an additional cx to x, which basically means we are adding the width twice.

I removed this double check.

[JasperSurmont]

Pinging @deluan as a reminder 😄 let me know if something is wrong in my thought process here.