### Godot version

4.1 db5113d

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

![image](https://github.com/godotengine/godot/assets/2223172/ee391a0d-44b7-4a35-bfa5-40d47af75f65)
Notice the empty space to the right. I actually have a worse case in my project, but I couldn't reproduce it outside:
![](https://chat.godotengine.org/file-upload/X3RMM5A9gN7RZEizo/Clipboard%20-%202%20czerwca%202023%2022:54)
Regression from #77651
CC @Rindbee 

### Steps to reproduce

1. Add a new script
2. Name it `;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;.gd`
3. Hover its name in the Script Editor

### Minimal reproduction project

N/A
ERR_READ_THREAD_GUARD_V(false);
	const Ref<StyleBox> *style = data.theme_style_override.getptr(p_name);
	return style != nullptr;
}
bool Control::has_theme_font_override(const StringName &p_name) const {
	ERR_READ_THREAD_GUARD_V(false);
	const Ref<Font> *font = data.theme_font_override.getptr(p_name);
	return font != nullptr;
}
bool Control::has_theme_font_size_override(const StringName &p_name) const {
	ERR_READ_THREAD_GUARD_V(false);
	const int *font_size = data.theme_font_size_override.getptr(p_name);
	return font_size != nullptr;
}
bool Control::has_theme_color_override(const StringName &p_name) const {
	ERR_READ_THREAD_GUARD_V(false);
	const Color *color = data.theme_color_override.getptr(p_name);
	return color != nullptr;
}
bool Control::has_theme_constant_override(const StringName &p_name) const {
	ERR_READ_THREAD_GUARD_V(false);
	const int *constant = data.theme_constant_override.getptr(p_name);
	return constant != nullptr;
}
float Control::get_theme_default_base_scale() const {
	ERR_READ_THREAD_GUARD_V(0);
	return data.theme_owner->get_theme_default_base_scale();
}
Ref<Font> Control::get_theme_default_font() const {