Fix example in README

Author: timhudson

README.md

@@ -14,8 +14,8 @@ $ npm install jsonreduce -g
 
 `this` will be each line of JSON that gets parsed out of the incoming newline-delimited json stream. Two arguments will be provided, `previous` and `current`. `current` is the current line being parsed while `previous` is the memoized value (same as `this`).
 
-```BASH
-$ echo '{"foo": "bar"}\n{"baz": "taco"}' | jsonreduce 'this.keys = this.keys.concat(Object.keys(current))'' --memo '{"keys": []}'
+``` bash
+$ echo '{"foo": "bar"}\n{"baz": "taco"}' | jsonreduce 'this.keys = this.keys.concat(Object.keys(current))' --memo '{"keys": []}'
 {"keys":["foo","baz"]}
 ```