Fix typo on Chapter 5, Section 5.

Section  5.1 is titled "5.1. Indicies" , should be "Indices".

Thanks for the book :)!

SUMMARY.md

@@ -19,7 +19,7 @@
     * [Comparators](conditional/comparators.md)
     * [Concatenate](conditional/concatenate.md)
 * [Arrays](arrays/README.md)
-    * [Indicies](arrays/indicies.md)
+    * [Indices](arrays/indices.md)
     * [Length](arrays/length.md)
 * [Loops](loops/README.md)
     * [For](loops/for.md)

arrays/indicies.md → arrays/indices.md

@@ -1,24 +1,24 @@
-# Indicies
+# Indices
 
-So you have your array of data elements, but what if you want to access a specific element? That is where indicies come in. An **index** refers to a spot in the array. Indicies logically progress one by one, but it should be noted that the first index in an array is 0, as it is in most languages. Brackets [] are used to signify you are referring to an index of an array. 
+So you have your array of data elements, but what if you want to access a specific element? That is where indices come in. An **index** refers to a spot in the array. indices logically progress one by one, but it should be noted that the first index in an array is 0, as it is in most languages. Brackets [] are used to signify you are referring to an index of an array.
 
 ```javascript
 // This is an array of strings
 var fruits = ["apple", "banana", "pineapple", "strawberry"];
 
 // We set the variable banana to the value of the second element of
-// the fruits array. Remember that indicies start at 0, so 1 is the
+// the fruits array. Remember that indices start at 0, so 1 is the
 // second element. Result: banana = "banana"
 var banana = fruits[1];
 ```
 ---
 
-Define the variables using the indices of the array 
+Define the variables using the indices of the array
 
 ```js
 var cars = ["Mazda", "Honda", "Chevy", "Ford"]
-var honda = 
-var ford = 
+var honda =
+var ford =
 var chevy =
 var mazda =
 ```