reedited the function.

Author: Mona-Eltantawy

Sprint-3/2-practice-tdd/repeat-str.js

@@ -1,6 +1,7 @@
-function repeatStr(str) {
-
-  return str.repeat(3);
+function repeatStr(str, count) {
+  if( count >= 0 )
+  {return str.repeat (count)};
+else { return 'invalid count'};
 }
 
 module.exports = repeatStr;