Based on upper-constraints and this being introduced in 0.7.3 of cmd2, this appears to be an issue in Pike and Queens:
Upper-constraints for stable/ocata: cmd2===0.6.9 Upper-constraints for stable/pike: cmd2===0.7.5 Upper-constraints for stable/queens: cmd2===0.7.9
Based on upper-constraints and this being introduced in 0.7.3 of cmd2, this appears to be an issue in Pike and Queens:
Upper-constraints for stable/ocata: cmd2===0.6.9
Upper-constraints for stable/pike: cmd2===0.7.5
Upper-constraints for stable/queens: cmd2===0.7.9