Testing: Update required `clang-format` version
@@ -107,7 +107,7 @@ For `make run_all` following development tools enable even more tests:
- The script `checkbashisms` is needed to check for bashism (`tests/shell/check_bashisms.sh`),
it is part of [`devscripts`](https://packages.debian.org/jessie/devscripts).
- The [POSIX compatibility test for shell scripts](../tests/shell/check_posix.sh) requires the tool [`shfmt`](https://github.com/mvdan/sh).
-- `git`, `clang-format` (version 5 up to version 7), and [cmake-format](https://github.com/cheshirekow/cmake_format) to check formatting.
+- `git`, `clang-format` (version 6 up to version 7), and [cmake-format](https://github.com/cheshirekow/cmake_format) to check formatting.
- `pkg-config` must be available (`check_external.sh` and `check_gen.sh`).
- A build environment including gcc (check_gen.sh).
- The [Markdown Shell Recorder](https://master.libelektra.org/tests/shell/shell_recorder/tutorial_wrapper)
