сортировать, объединять или проверять последовательность текстовых файлов (sort, merge, or sequence check text files)
Будущие направления (Future directions)
A future version of this standard may require that if the
collating sequence of the current locale does not have a total
ordering of all characters, any lines of input that collate
equally when comparing them as whole lines are further compared
byte-by-byte using the collating sequence for the POSIX locale.
