As you have now learned, tests always need to be rerun and reports should always be checked.
To validate the repair:
From the Window menu, select Close All.
In the Project Browser tab on the right-hand side of the screen, left-click the UmtsCode component testing node and then click the Build toolbar button.
The test has finished executing when the green execution light on the lower-right of the UI stops flashing.
Double-click the UmtsCode component testing node to view all of the reports.
Select the Test Report tab.
When looking at the Report Window to the left, you will find that the defect has been repaired. It's a good thing you tested all three possible coverage levels for the while loop!
Select the menu item File->Save Project.