Chapter 7: (read-string ("+"))

This line: https://github.com/flyingmachine/brave-clojure-web/blob/master/content/cftbat/read-and-eval.html#L238

Extra parens around `"+"`:
``` clojure
(read-string ("+"))
; => +
```
Instead, it should be:
``` clojure
(read-string "+")
; => +
```

Amazing chapter! And very useful tree images.