[right] and [center] alignment in RichTextLabel keeps space before a line wrap

[CorentinBrule]

Godot version

v3.5.stable.official [991bb6a]

System information

Windows 11

Issue description

the [right] BBCode tag for right alignement in RichTextLabel does a bad behaviour. He keeps space before a line wrap instead of avoid space. He does the good thing in a line break.

Actual :

expected :

Steps to reproduce

create a RichTextLabel, enable BBCode and write a text between [right] and [/right] of a length greater than the width of the RichTextLabel rect to cause line wraps.

Minimal reproduction project

gui_rich_text_bbcode.zip

[akien-mga]

CC @bruvzg @timothyqiu

[bruvzg]

The same is true for 4.0, seems like we need to trim edge spaces for the right alignment in the similar way we do for fill.

[CorentinBrule]

if it helps: Label elements with Align property on Right has the right behaviour :)

[akien-mga]

This should also be trimmed for [center], see #64779 for a MRP (CC @rokasv).