Don't require `ack`, `grep` can do the job. (#7753)
Don't require `ack`, `grep` can do the job. (#7753)

I don't have ack installed and hit an error in shell checks. Since we
already use grep, stick with it at the cost of a tiny bit more
verbosity.

tdyas/pants,tdyas/pants,pantsbuild/pants,pantsbuild/pants,wisechengyi/pants,benjyw/pants,jsirois/pants,wisechengyi/pants,twitter/pants,benjyw/pants,benjyw/pants,pantsbuild/pants,tdyas/pants,pantsbuild/pants,tdyas/pants,wisechengyi/pants,tdyas/pants,wisechengyi/pants,benjyw/pants,twitter/pants,benjyw/pants,tdyas/pants,wisechengyi/pants,twitter/pants,wisechengyi/pants,tdyas/pants,pantsbuild/pants,twitter/pants,tdyas/pants,jsirois/pants,twitter/pants,pantsbuild/pants,wisechengyi/pants,jsirois/pants,wisechengyi/pants,tdyas/pants,twitter/pants,pantsbuild/pants,twitter/pants,benjyw/pants,twitter/pants,benjyw/pants,twitter/pants,wisechengyi/pants