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

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

@@ -0,0 +1,8 @@
+class ToStringExplicitInclude {
+	int x;
+	@java.lang.Override
+	@java.lang.SuppressWarnings("all")
+	public java.lang.String toString() {
+		return "ToStringExplicitInclude()";
+	}
+}