The graph to describe the directory is a misprint, right? "testing 123\n" isn't anywhere, and "Hello World" (and its hash) is pictured twice. I'm sure that the

The graph to describe the directory is a misprint, right? "testing 123\n" isn't anywhere, and "Hello World" (and its hash) is pictured twice. I'm sure that the testing.txt arrow should just be pointing to a node with a different hash and content.