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/math/vector2.h b/core/math/vector2.h
index 5aa40d45f7..e5774f1d55 100644
--- a/core/math/vector2.h
+++ b/core/math/vector2.h
@@ -157,13 +157,16 @@ _FORCE_INLINE_ Vector2 operator*(real_t p_scalar, const Vector2 &p_vec) {
 _FORCE_INLINE_ Vector2 Vector2::operator+(const Vector2 &p_v) const {
 	return Vector2(x + p_v.x, y + p_v.y);
 }
+
 _FORCE_INLINE_ void Vector2::operator+=(const Vector2 &p_v) {
 	x += p_v.x;
 	y += p_v.y;
 }
+
 _FORCE_INLINE_ Vector2 Vector2::operator-(const Vector2 &p_v) const {
 	return Vector2(x - p_v.x, y - p_v.y);
 }
+
 _FORCE_INLINE_ void Vector2::operator-=(const Vector2 &p_v) {
 	x -= p_v.x;
 	y -= p_v.y;
@@ -201,6 +204,7 @@ _FORCE_INLINE_ Vector2 Vector2::operator-() const {
 _FORCE_INLINE_ bool Vector2::operator==(const Vector2 &p_vec2) const {
 	return x == p_vec2.x && y == p_vec2.y;
 }
+
 _FORCE_INLINE_ bool Vector2::operator!=(const Vector2 &p_vec2) const {
 	return x != p_vec2.x || y != p_vec2.y;
 }