tweak name of parameter

Author: baob

src/extractData.js

@@ -14,7 +14,7 @@ const extractData = (event) => {
 
     return {
         message: text,
-        at_user: atUser,
+        atUser,
         link,
     };
 };

src/extractData.test.js

@@ -24,7 +24,7 @@ describe('extractData()', () => {
     });
 
     it('extracts the user that sent the message', () => {
-        expect(returnValue()).toHaveProperty('at_user', '<@UtheRealUser>');
+        expect(returnValue()).toHaveProperty('atUser', '<@UtheRealUser>');
     });
 
     it('returns the message without the @mention of the bot user', () => {
@@ -54,6 +54,7 @@ describe('extractData()', () => {
             expect(returnValue()).toHaveProperty('link', 'http://facebook.com');
         });
     });
+
     describe('with a message with a link in slack markup without pipe with trailing slash ', () => {
         it('returns the link embedded in the message', () => {
             eventText = '<@U0E0G11N9J5>  <http://facebook.com/>';