[paulddraper]

What the heck?

You're right, the hidden scanFile()...makes no sense.

It's stripping all the new lines from the input.

Why? What is going on?

[elFarto]

He's using it to read the entire files contents into memory, and re-running the lines() method from the now in-memory buffer, presumably to remove any disk I/O from bottle necking the lines() function.

Not the best method to use, probably better to use the Files.readString method.