Add functionality to initialize and check_out methods on Class Book
added missing 'end' for method check_out on class Book
complete Class Book, satisfying all tests. Make corrections to syntax errors in rspec tests.
complete Class Borrower. Create variable for name in initialize and add an attr_read for name. Set the test circumstance to active for Borrower to verify that Class satisfies test
add functionality to init and add_book on Class Library. Correct syntax errors in testing (for instance register_new_book changes to add_book)
adds functionality to check_out_book in Class Library. adds relevant attr_readers implements test case for check_out_book
Corrected test for 'knows who borrowed a book' to expect the actual Borrower Object instead of the name of the borrower.
Satified requirement for 'cannot be checked out twice' in tests for Class Book