fix collapsing of multiline components and rsx!{} calls (#2849)

packages/autofmt/tests/samples/collapse.rsx

@@ -0,0 +1,21 @@
+// nesting pushes out
+rsx! {
+    Fragment {
+        Fragment {
+            Fragment {
+                Fragment {
+                    Fragment {
+                        div { "Finally have a real node!" }
+                    }
+                }
+            }
+        }
+    }
+}
+
+// we don't make extra spaces
+rsx! {
+    Component { blah: rsx! {} }
+}
+
+rsx! {}