Copy edits (#35536)

* Copy edits to Basic JavaScript section

* Copy edits to ES6 section

* Update index.md

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md

@@ -11,8 +11,8 @@ We have an array of objects representing different people in our contacts lists.
 A <code>lookUpProfile</code> function that takes <code>name</code> and a property (<code>prop</code>) as arguments has been pre-written for you.
 The function should check if <code>name</code> is an actual contact's <code>firstName</code> and the given property (<code>prop</code>) is a property of that contact.
 If both are true, then return the "value" of that property.
-If <code>name</code> does not correspond to any contacts then return <code>"No such contact"</code>
-If <code>prop</code> does not correspond to any valid properties of a contact found to match <code>name</code> then return <code>"No such property"</code>
+If <code>name</code> does not correspond to any contacts then return <code>"No such contact"</code>.
+If <code>prop</code> does not correspond to any valid properties of a contact found to match <code>name</code> then return <code>"No such property"</code>.
 </section>
 
 ## Instructions

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-the-rest-operator-with-function-parameters.english.md

@@ -8,7 +8,7 @@ challengeType: 1
 <section id='description'>
 In order to help us create more flexible functions, ES6 introduces the <dfn>rest operator</dfn> for function parameters. With the rest operator, you can create functions that take a variable number of arguments. These arguments are stored in an array that can be accessed later from inside the function.
 Check out this code:
-<blockquote>function howMany(...args) {<br>&nbsp;&nbsp;return "You have passed " + args.length + " arguments.";<br>}<br>console.log(howMany(0, 1, 2)); // You have passed 3 arguments<br>console.log(howMany("string", null, [1, 2, 3], { })); // You have passed 4 arguments.</blockquote>
+<blockquote>function howMany(...args) {<br>&nbsp;&nbsp;return "You have passed " + args.length + " arguments.";<br>}<br>console.log(howMany(0, 1, 2)); // You have passed 3 arguments.<br>console.log(howMany("string", null, [1, 2, 3], { })); // You have passed 4 arguments.</blockquote>
 The rest operator eliminates the need to check the <code>args</code> array and allows us to apply <code>map()</code>, <code>filter()</code> and <code>reduce()</code> on the parameters array.
 </section>