Writing Macros - fixed a broken function call of code-critic

[josby]

In Chapter 8, right before Things to Watch Out For there is a macro code-critic which uses keyword arguments. However the example call of code-critic does not pass a map, which leads to ArityException.

in short:

replaced (code-critic (1 + 1) (+ 1 1)) with (code-critic {:bad (1 + 1), :good (+ 1 1)})