add tests to ensure onlyExplicitlyIncluded means nothing if no fields are annotated. Fixes #1772

test/transform/resource/after-ecj/ToStringExplicitInclude.java

@@ -0,0 +1,9 @@
+@lombok.ToString(onlyExplicitlyIncluded = true) class ToStringExplicitInclude {
+  int x;
+  ToStringExplicitInclude() {
+    super();
+  }
+  public @java.lang.Override @java.lang.SuppressWarnings("all") java.lang.String toString() {
+    return "ToStringExplicitInclude()";
+  }
+}