adjusted test to new functionality not using filter anymore

src/test/fs_util.rs

@@ -5,5 +5,5 @@ fn test_fetch_asciidoctor_paths_recursive() {
     let paths = fs_util::fetch_paths_recursive("res/test/docs").unwrap();
     let len = paths.len();
     dbg!(paths);
-    assert_eq!(len, 4);
+    assert_eq!(len, 5);
 }