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Re:look(1): lines beginning with given string by emmelaich on Saturday December 12, 2015 @10:44PM (#10725339)
sort(1) might not use the same ordering as look(1)

Try setting LC_COLLATE=C and export it and retry.

Re:look(1): lines beginning with given string by hanez on Saturday December 12, 2015 @10:47PM (#10725349)
Uh, wow! That was it!

Thanks for this answer...