Fix typo in objc lexer, the string `@interface NSString(Levenshtein)` was being broken due to an asterisk in the wrong spot.
Fix typo in objc lexer, the string `@interface NSString(Levenshtein)` was
being broken due to an asterisk in the wrong spot.

aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments