Javascript: Added hint to Match Non-Whitespace Characters (#19243)

* Javascript: Added hint to Match Non-Whitespace Characters

Added hint to Match Non-Whitespace Characters (https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters and https://guide.freecodecamp.org/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters/)

* Replace match->matching

* Fixed grammar

client/src/guide/english/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters/index.md

@@ -1,10 +1,20 @@
----
+
-title: Match Non-Whitespace Characters
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 ## Match Non-Whitespace Characters
 
-This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/javascript-algorithms-and-data-structures/regular-expressions/match-non-whitespace-characters/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
-
-<a href='https://github.com/freecodecamp/guides/blob/master/README.md' target='_blank' rel='nofollow'>This quick style guide will help ensure your pull request gets accepted</a>.
-
 <!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds  -->
+
+## Problem:
+
+We need to change the regex ```countNonWhiteSpace``` to look for multiple non-whitespace characters in a string.
+
+## Solution:
+
+```js
+let sample = "Whitespace is important in separating words";
+let countNonWhiteSpace = /\S/g; // Change this line
+let result = sample.match(countNonWhiteSpace);
+```
+
+## Explanation:
+
+We use ```\S```, and this pattern will not match any of: whitespace, carriage return, tab, form feed, and new line characters. So we find all matching non-whitespace characters.