…dalone carriage returnWhen TextIOWrapper.tell() is called after reading a line that ends with astandalone carriage return (\r), the tell optimization algorithm incorrectlyassumes there is buffered data to search through. This causes an assertionfailure when skip_back=1 exceeds the empty buffer size.The fix detects when next_input is empty and skips the optimization phase,falling back to the byte-by-byte decoding method which always works correctly.This properly handles the architectural constraint that buffer optimizationcannot function without buffered data.

…dalone carriage returnAdd test case and fix assertion failure in TextIOWrapper.tell() when readingfiles that end with a standalone carriage return (\r). The optimizationalgorithm incorrectly assumed buffered data would always be available,causing an assertion failure when next_input is empty.

- Remove trailing whitespace- Add missing newline at end of NEWS file