Please note that long lines in code examples may receive a line-break, denoted by the backslash sign \. Take care to put those lines into your editor as one line.
Take, for example, this code block:
dbSession.fetchAll('SELECT id, value, categoryID FROM keyword \
ORDER BY id', function(err, rows) {
The PDF version of this book shows a line break right after the keyword part, denoted by a \ after the keyword.
However, in your editor, you need to make sure that the whole code resides on one line.
Also, note that from what I can see, code blocks can not be copy-pasted from the PDF version of this book. While this might seem like a major annoyance, experience shows that learning to program works way better if one is forced to transcribe code from a book into the editor.