If a third parameter of any kind is included with the XFCN, then String also returns a second line in its result. The second line contains the next address (in hex) that follows the dumped string.
The contents of the string at address 2E0 (the name of the finder) is displayed below using the format you specified. The blinking asterisk shows you exactly where the string ends. Note that the Z option returns a number of blank spaces which are not present in the string returned by the P option. If you use the X or L option, you can see these blanks displayed in hex as a series of 20's.