Log Message:
p5-ack: update to 2.22.

2.22    Fri Dec 22 16:42:43 CST 2017
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No changes since 2.21_01.

2.21_01 Mon Dec 18 23:40:45 CST 2017
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[FIXES]
Avoid a fatal error that sometimes happened if a file was unreadable.
(GH#520)

[ENHANCEMENTS]
Added support for the Kotlin language.

Sped up file type detection for certain files.

2.20    Sun Dec 10 21:54:55 CST 2017
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No changes since 2.19_01.

2.19_01 Thu Dec  7 23:35:53 CST 2017
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[FIXES]
Changed a construction in the docs that Ubuntu flagged as a misspelling.

[ENHANCEMENTS]
When using submodules, the .git directory will be a file.  Make ack
ignore this by default.  Thanks, Michele Campeotto. (GH#653)

[INTERNALS]
Replaced all the test data for the test suite with public domain documents.