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, 1 insertions, 0 deletions

diff --git a/scene/2d/visibility_notifier_2d.cpp b/scene/2d/visibility_notifier_2d.cpp
index 6b03d86e8b..1f250bbdf6 100644
--- a/scene/2d/visibility_notifier_2d.cpp
+++ b/scene/2d/visibility_notifier_2d.cpp
@@ -333,6 +333,7 @@ void VisibilityEnabler2D::set_enabler(Enabler p_enabler, bool p_enable) {
 	ERR_FAIL_INDEX(p_enabler, ENABLER_MAX);
 	enabler[p_enabler] = p_enable;
 }
+
 bool VisibilityEnabler2D::is_enabler_enabled(Enabler p_enabler) const {
 	ERR_FAIL_INDEX_V(p_enabler, ENABLER_MAX, false);
 	return enabler[p_enabler];