Problems with NSHipster NSCharacterSet example

gistfile1.txt

Errors in the squashing whitespace example code:

    main.m:13:57: error: expected ';' at end of declaration
    NSString *string = @"Lorem    ipsum dolar   sit  amet ."
                                                            ^

    main.m:14:90: error: extraneous ']' before ';'
    string = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
                                                                                             ^

Actual result of the example code, on OS X 10.8.1 & Xcode 4.5 GM:

    2012-09-18 12:04:32.843 tester[22688:c07] Lorem    ipsum dolar   sit  amet .


Correct code:

    NSString *string = @"Lorem    ipsum dolar   sit  amet .";
    string = [[[string componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]
        filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"self != ''"]]
        componentsJoinedByString:@" "];