arr - (re)arrange and select fields on each line

	Commit message (Collapse)	Author	Age	Files	Lines
*	Cleanup	Christian Neukirchen	2015-11-14	1	-27/+0
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*	Negative numbers count from the end	Christian Neukirchen	2015-11-14	1	-11/+22
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*	Don't strip delimiter on EOF	Christian Neukirchen	2015-11-14	1	-2/+4
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*	Check all bounds	Christian Neukirchen	2015-11-14	1	-13/+28
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*	Check for proper "?" syntax	Christian Neukirchen	2015-11-14	1	-1/+5
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*	Add some error handling	Christian Neukirchen	2015-11-14	1	-9/+30
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*	Fill up argument list with implicit stdin	Christian Neukirchen	2015-11-14	1	-9/+15
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*	cleanup	Christian Neukirchen	2015-11-14	1	-3/+0
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*	initial commit of arr	Christian Neukirchen	2015-11-14	1	-0/+263