fix(learn): remove white space for quick fix (#40231)

* fix(learn): remove white space for quick fix

Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-higher-order-functions-map-filter-or-reduce-to-solve-a-complex-problem.md

@@ -6,27 +6,30 @@ forumTopicId: 301311
 ---
 
 ## Description
+
 <section id='description'>
 Now that you have worked through a few challenges using higher-order functions like <code>map()</code>, <code>filter()</code>, and <code>reduce()</code>, you now get to apply them to solve a more complex challenge.
 </section>
 
 ## Instructions
+
 <section id='instructions'>
 We have defined a function named <code>squareList</code>.  You need to complete the code for the <code>squareList</code> function using any combination of <code>map()</code>, <code>filter()</code>, and <code>reduce()</code> so that it returns a new array containing only the square of <em>only</em> the positive integers (decimal numbers are not integers) when an array of real numbers is passed to it.  An example of an array containing only real numbers is <code>[-3, 4.8, 5, 3, -3.2]</code>.
 <strong>Note:</strong> Your function should not use any kind of <code>for</code> or <code>while</code> loops or the <code>forEach()</code> function.
 </section>
 
 ## Tests
+
 <section id='tests'>
 
 ```yml
 tests:
   - text: <code>squareList</code> should be a <code>function</code>.
     testString: assert.typeOf(squareList, 'function'), '<code>squareList</code> should be a <code>function</code>';
-  - text: for or while loops or forEach should not be used.
+  - text: <code>for</code>, <code>while</code>, and <code>forEach</code> should not be used.
     testString: assert(!__helpers.removeJSComments(code).match(/for|while|forEach/g));
   - text: <code>map</code>, <code>filter</code>, or <code>reduce</code> should be used.
-    testString: assert(__helpers.removeJSComments(code).match(/\.(map|filter|reduce)\s*\(/g));
+    testString: assert(__helpers.removeWhiteSpace(__helpers.removeJSComments(code)).match(/\.(map|filter|reduce)\(/g));
   - text: The function should return an <code>array</code>.
     testString: assert(Array.isArray(squareList([4, 5.6, -9.8, 3.14, 42, 6, 8.34, -2])));
   - text: <code>squareList([4, 5.6, -9.8, 3.14, 42, 6, 8.34, -2])</code> should return <code>[16, 1764, 36]</code>.
@@ -38,12 +41,13 @@ tests:
 </section>
 
 ## Challenge Seed
+
 <section id='challengeSeed'>
 
 <div id='js-seed'>
 
 ```js
-const squareList = (arr) => {
+const squareList = arr => {
   // Only change code below this line
   return arr;
   // Only change code above this line
@@ -58,10 +62,11 @@ console.log(squaredIntegers);
 </section>
 
 ## Solution
+
 <section id='solution'>
 
 ```js
-const squareList = (arr) => {
+const squareList = arr => {
   const positiveIntegers = arr.filter(num => {
     return num >= 0 && Number.isInteger(num);
   });