Setup spacing rules for anonymous initializers

idea/testData/formatter/AnonymousInitializersLineBreak.after.kt

@@ -0,0 +1,35 @@
+annotation class Ann
+class A
+{
+    {
+    }
+
+    {
+    }
+
+    init
+    {
+    }
+
+    init
+    {
+    }
+
+    init
+    {
+    }
+
+    {
+    }
+
+    /* abcde */init
+    {
+
+    }
+
+    /* abc */ init // eol-comment
+    {
+
+    }
+}
+// SET_TRUE: LBRACE_ON_NEXT_LINE