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Use try-resource management
This should drastically simplify resource management code, eliminate
warnings, and ensure resources aren't being leaked.
Silence some warnings about unclosed resources
The warnings were all false-positives.
ignore verbosity so that GHCi output shows
cap error output to avoid running out of memory
update and remove obsolete tests, bump version to 2.5.0
move CommandLineUtil, put quotes around parameters with spaces