Allow lines to be specified as comma delimited number ranges for arc browse
Allow lines to be specified as comma delimited number ranges for arc browse

Summary: Ref T5971. We lose validation of the line ranges, but I don't think that's a huge issue.

Test Plan: Ran `arc browse README`, `arc browse README:3`, and `arc browse README:3,6-7`

Reviewers: btrahan, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Maniphest Tasks: T5971

Differential Revision: https://secure.phabricator.com/D10352

eSpark/arcanist,codelabs-ch/arcanist,fivestars/arcanist,Khan/arcanist,Symplicity/arcanist,jra3/arcanist,hach-que/arcanist,PageUpPeopleOrg/arcanist-patches,wharris/arcanist,Khan/arcanist,coursera/arcanist,folsom-labs/arcanist,memsql/arcanist,r4nt/arcanist,folsom-labs/arcanist,codelabs-ch/arcanist,haskell-infra/arcanist,wharris/arcanist,codelabs-ch/arcanist,haskell-infra/arcanist,zhihu/arcanist,hach-que/arcanist,wxstars/arcanist,kevinseelbach/arcanist,uber/arcanist,KieranHayes/arcanist,wharris/arcanist,r4nt/arcanist,eSpark/arcanist,wikimedia/phabricator-arcanist,PageUpPeopleOrg/arcanist-patches,wxstars/arcanist,chundongwang/arcanist,Symplicity/arcanist,phacility/arcanist,zhihu/arcanist,chundongwang/arcanist,alexmv/arcanist,wxstars/arcanist,aik099/arcanist,wikimedia/phabricator-arcanist,phacility/arcanist,dguo-coursera/arcanist,sneakpeeq/arcanist,dguo-coursera/arcanist,wikimedia/phabricator-arcanist,codelabs-ch/arcanist,alexmv/arcanist,zhihu/arcanist,phacility/arcanist,haskell-infra/arcanist,jra3/arcanist,sneakpeeq/arcanist,eSpark/arcanist,chundongwang/arcanist,aik099/arcanist,Khan/arcanist,phacility/arcanist,memsql/arcanist,uber/arcanist,calblueprint/arcanist,PageUpPeopleOrg/arcanist-patches,folsom-labs/arcanist,eSpark/arcanist,Symplicity/arcanist,aik099/arcanist,KieranHayes/arcanist,jra3/arcanist,r4nt/arcanist,wikimedia/phabricator-arcanist,coursera/arcanist,KieranHayes/arcanist,alexmv/arcanist,haskell-infra/arcanist,wharris/arcanist,memsql/arcanist,kevinseelbach/arcanist,kevinseelbach/arcanist,memsql/arcanist,Symplicity/arcanist,phacility/arcanist,aik099/arcanist,hach-que/arcanist,PageUpPeopleOrg/arcanist-patches,fivestars/arcanist,wxstars/arcanist,chundongwang/arcanist,zhihu/arcanist,r4nt/arcanist,folsom-labs/arcanist,coursera/arcanist,sneakpeeq/arcanist,coursera/arcanist,hach-que/arcanist,calblueprint/arcanist,calblueprint/arcanist,dguo-coursera/arcanist,Khan/arcanist,codelabs-ch/arcanist,uber/arcanist,fivestars/arcanist,fivestars/arcanist,jra3/arcanist,dguo-coursera/arcanist,KieranHayes/arcanist,kevinseelbach/arcanist,calblueprint/arcanist,alexmv/arcanist,uber/arcanist,sneakpeeq/arcanist