Problem handling long lines of text

It is not possible to modify the base64 line in this text file.
https://gitlab.xfce.org/panel-plugins/xfce4-notes-plugin/uploads/86aa671aa0f57da33b33c63eff44e737/photo.txt

Bug found due to panel-plugins/xfce4-notes-plugin#43 (closed)

Tested on mousepad 1.5.1 on Xubuntu 20.04.

It's the same or even worse with Gedit, I think it is this upstream issue: https://gitlab.gnome.org/GNOME/gtksourceview/-/issues/121.

Nothing specific to Mousepad in any case, nor to xfce4-notes-plugin in my opinion.

closed

mentioned in issue panel-plugins/xfce4-notes-plugin#43 (closed)

added 3. Not Xfce label

added 3. Won't Fix label

added 4. Upstream Issue label

marked this issue as related to #166 (closed)