Сабж. Changelog:
* Noteworthy changes in release 3.6 (2017-05-21) [stable]
** New features
When one file is a prefix of the other, cmp now appends the shorter
file's size to the EOF diagnostic.
** Bug fixes
Using an invalid regular expression with --ignore-matching-lines=RE (-I)
no longer causes stack overflow. Before, with an invocation like the
following, diff would diagnose the error, but would still proceed to
blow the stack: diff -Ia -I\\ <(echo) <(echo b)
[bug introduced in 2.9]
diff no longer mishandles line numbers exceeding 2**31 on Mingw-w64.
the ---presume-output-tty (ostensibly test-only) option would cause
diff --color to read an uninitialized variable
[bug introduced in 3.4]
** Performance changes
diff's default algorithm has been tweaked to deal better with larger
files, reversing some of the changes made in diffutils-3.4.
