small fixes

Author: amejiarosario

book/chapters/preface.adoc

@@ -79,4 +79,4 @@ Measurement is the first step that leads to control and eventually to improvemen
 
 Your feedback is very welcome and valuable. Let us know what your thoughts about this book — what you like or ideas to make it better.
 
-To send us feedback, e-mail us at hello+dsajs@adrianmejia.com, send a tweet to @amejiarosario, or post a question on Stack Overflow using the `algorithms` `javascript` tags.
+To send us feedback, e-mail us at hello+dsajs@adrianmejia.com, send a tweet to @amejiarosario, or post a question on Stack Overflow using the `algorithms`, `javascript` tags.

src/algorithms/sorting/quick-sort.js

@@ -34,9 +34,9 @@ function partition(array, low, high) {
 /**
  * QuickSort - Efficient in-place recursive sorting algorithm.
  * Avg. Runtime: O(n log n) | Worst: O(n^2)
- * @param {*} array
- * @param {*} low
- * @param {*} high
+ * @param {Number[]} array
+ * @param {Number} low
+ * @param {Number} high
  */
 function quickSort(array, low = 0, high = array.length - 1) {
   if (low < high) { // <4>