Style: Enforce separation line between function definitions

I couldn't find a tool that enforces it, so I went the manual route:
```
find -name "thirdparty" -prune \
  -o -name "*.cpp" -o -name "*.h" -o -name "*.m" -o -name "*.mm" \
  -o -name "*.glsl" > files
perl -0777 -pi -e 's/\n}\n([^#])/\n}\n\n\1/g' $(cat files)
misc/scripts/fix_style.sh -c
```

This adds a newline after all `}` on the first column, unless they
are followed by `#` (typically `#endif`). This leads to having lots
of places with two lines between function/class definitions, but
clang-format then fixes it as we enforce max one line of separation.

This doesn't fix potential occurrences of function definitions which
are indented (e.g. for a helper class defined in a .cpp), but it's
better than nothing. Also can't be made to run easily on CI/hooks so
we'll have to be careful with new code.

Part of #33027.

1 files changed, 5 insertions, 0 deletions

diff --git a/scene/gui/option_button.cpp b/scene/gui/option_button.cpp
index b3c024bd1d..bc4eec5ba3 100644
--- a/scene/gui/option_button.cpp
+++ b/scene/gui/option_button.cpp
@@ -112,6 +112,7 @@ void OptionButton::add_icon_item(const Ref<Texture2D> &p_icon, const String &p_l
 	if (popup->get_item_count() == 1)
 		select(0);
 }
+
 void OptionButton::add_item(const String &p_label, int p_id) {
 	popup->add_radio_check_item(p_label, p_id);
 	if (popup->get_item_count() == 1)
@@ -124,12 +125,14 @@ void OptionButton::set_item_text(int p_idx, const String &p_text) {
 	if (current == p_idx)
 		set_text(p_text);
 }
+
 void OptionButton::set_item_icon(int p_idx, const Ref<Texture2D> &p_icon) {
 	popup->set_item_icon(p_idx, p_icon);
 
 	if (current == p_idx)
 		set_icon(p_icon);
 }
+
 void OptionButton::set_item_id(int p_idx, int p_id) {
 	popup->set_item_id(p_idx, p_id);
 }
@@ -220,6 +223,7 @@ int OptionButton::get_selected_id() const {
 		return 0;
 	return get_item_id(current);
 }
+
 Variant OptionButton::get_selected_metadata() const {
 	int idx = get_selected();
 	if (idx < 0)
@@ -247,6 +251,7 @@ Array OptionButton::_get_items() const {
 
 	return items;
 }
+
 void OptionButton::_set_items(const Array &p_items) {
 	ERR_FAIL_COND(p_items.size() % 5);
 	clear();