Tweaked regex for better utf and whitespace cleaning

src/app/utils/create-comment-keywords.ts

@@ -19,7 +19,7 @@ export class CreateCommentKeywords {
   }
   static cleaningFunction(text: string): string {
     // eslint-disable-next-line max-len
-    const regexEmoji    = new RegExp('(?:\\:.*?\\:|[\u2700-\u27bf]|(?:\ud83c[\udde6-\uddff]){2}|[\ud800-\udbff][\udc00-\udfff]|[\u0023-\u0039]\ufe0f?\u20e3|\u3299|\u3297|\u303d|\u3030|\u24c2|\ud83c[\udd70-\udd71]|\ud83c[\udd7e-\udd7f]|\ud83c\udd8e|\ud83c[\udd91-\udd9a]|\ud83c[\udde6-\uddff]|\ud83c[\ude01-\ude02]|\ud83c\ude1a|\ud83c\ude2f|\ud83c[\ude32-\ude3a]|\ud83c[\ude50-\ude51]|\u203c|\u2049|[\u25aa-\u25ab]|\u25b6|\u25c0|[\u25fb-\u25fe]|\u00a9|\u00ae|\u2122|\u2139|\ud83c\udc04|[\u2600-\u26FF]|\u2b05|\u2b06|\u2b07|\u2b1b|\u2b1c|\u2b50|\u2b55|\u231a|\u231b|\u2328|\u23cf|[\u23e9-\u23f3]|[\u23f8-\u23fa]|\ud83c\udccf|\u2934|\u2935|[\u2190-\u21ff])','g');
+    const regexEmoji    = new RegExp('\uD918\uDD28|\ufe0f|\u200D|\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff]', 'g');
     const regexKatex    = new RegExp('\\$[^$\\n ]+\\$|\\$\\$[^$\\n ]+\\$\\$','g');
     const regexMarkdown = new RegExp('(?:__|[*#])|\\[(.+?)]\\((.+?)\\)', 'g');
     const regexBlank    = new RegExp('[\\s]{2,}', 'g');