R1:ca042df6deac

Minor change to suppress linter warning

Summary: Rewrite this expression so that the second parameter to `qsprintf` is a scalar.

Test Plan: `arc lint`

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11913