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, 4 insertions, 0 deletions

diff --git a/core/class_db.cpp b/core/class_db.cpp
index 79e145248c..0a187416f4 100644
--- a/core/class_db.cpp
+++ b/core/class_db.cpp
@@ -255,6 +255,7 @@ bool ClassDB::is_parent_class(const StringName &p_class, const StringName &p_inh
 
 	return false;
 }
+
 void ClassDB::get_class_list(List<StringName> *p_classes) {
 	OBJTYPE_RLOCK;
 
@@ -505,6 +506,7 @@ Object *ClassDB::instance(const StringName &p_class) {
 #endif
 	return ti->creation_func();
 }
+
 bool ClassDB::can_instance(const StringName &p_class) {
 	OBJTYPE_RLOCK;
 
@@ -934,6 +936,7 @@ void ClassDB::get_property_list(StringName p_class, List<PropertyInfo> *p_list,
 		check = check->inherits_ptr;
 	}
 }
+
 bool ClassDB::set_property(Object *p_object, const StringName &p_property, const Variant &p_value, bool *r_valid) {
 	ClassInfo *type = classes.getptr(p_object->get_class_name());
 	ClassInfo *check = type;
@@ -978,6 +981,7 @@ bool ClassDB::set_property(Object *p_object, const StringName &p_property, const
 
 	return false;
 }
+
 bool ClassDB::get_property(Object *p_object, const StringName &p_property, Variant &r_value) {
 	ClassInfo *type = classes.getptr(p_object->get_class_name());
 	ClassInfo *check = type;