[Oops.] Typo in Chapter 2 Backtracking

[Gurnek]

Please verify that the error is present in the most recent revision before reporting.

Chapter number or note title: Chapter 2 Backtracking

Page number: 88

Error description: In the pseudocode at the top of the page, line 4 is "return LISBigger(prev, A[2..n)" which is missing a closing bracket for A.

Suggested fix (if any): Add a closing bracket for A