Update snippet descriptions

snippets/sortedIndexBy.md

@@ -3,16 +3,18 @@ title: sortedIndexBy
 tags: array,math,intermediate
 ---
 
-Returns the lowest index at which value should be inserted into array in order to maintain its sort order, based on a provided iterator function.
+Finds the lowest index at which a value should be inserted into an array in order to maintain its sorting order, based on the provided iterator function.
 
-- Check if the array is sorted in descending order (loosely).
+- Loosely check if the array is sorted in descending order.
 - Use `Array.prototype.findIndex()` to find the appropriate index where the element should be inserted, based on the iterator function `fn`.
 
 ```js
 const sortedIndexBy = (arr, n, fn) => {
   const isDescending = fn(arr[0]) > fn(arr[arr.length - 1]);
   const val = fn(n);
-  const index = arr.findIndex(el => (isDescending ? val >= fn(el) : val <= fn(el)));
+  const index = arr.findIndex(el =>
+    isDescending ? val >= fn(el) : val <= fn(el)
+  );
   return index === -1 ? arr.length : index;
 };
 ```