[feat] Show the last N lines in test failures

reframe-hpc / reframe

A powerful Python framework for writing and running portable regression tests and benchmarks for HPC systems.

https://reframe-hpc.readthedocs.org

BSD 3-Clause "New" or "Revised" License

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Closed vkarak closed 1 month ago

vkarak commented 1 month ago

Showing the last N lines of stdout/stderr conveys more accurate information about the failure than the first 10.

A configuration parameter is also introduced to control the number of lines printed.
Some code style fixes
Add missing configuration variable from #3173.

Closes #3289.