hotkey: Improve clarity of error messages in hotkeys tests.
hotkey: Improve clarity of error messages in hotkeys tests.

This will provide a clearer error message than a ReferenceError as to
what's wrong when the wrong values are in hotkey tests.

brainwane/zulip,shubhamdhama/zulip,vaidap/zulip,Galexrt/zulip,punchagan/zulip,amanharitsh123/zulip,Galexrt/zulip,jphilipsen05/zulip,vaidap/zulip,jrowan/zulip,vabs22/zulip,mahim97/zulip,j831/zulip,christi3k/zulip,hackerkid/zulip,jainayush975/zulip,zulip/zulip,shubhamdhama/zulip,kou/zulip,synicalsyntax/zulip,rht/zulip,dhcrzf/zulip,Galexrt/zulip,eeshangarg/zulip,ryanbackman/zulip,hackerkid/zulip,christi3k/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,rishig/zulip,andersk/zulip,jainayush975/zulip,dhcrzf/zulip,amanharitsh123/zulip,tommyip/zulip,timabbott/zulip,eeshangarg/zulip,brainwane/zulip,vaidap/zulip,brainwane/zulip,aakash-cr7/zulip,rht/zulip,jainayush975/zulip,brainwane/zulip,verma-varsha/zulip,synicalsyntax/zulip,ryanbackman/zulip,zulip/zulip,synicalsyntax/zulip,dhcrzf/zulip,zulip/zulip,andersk/zulip,christi3k/zulip,SmartPeople/zulip,vaidap/zulip,showell/zulip,punchagan/zulip,kou/zulip,brainwane/zulip,jackrzhang/zulip,jphilipsen05/zulip,jphilipsen05/zulip,showell/zulip,mahim97/zulip,eeshangarg/zulip,tommyip/zulip,Galexrt/zulip,verma-varsha/zulip,jrowan/zulip,jainayush975/zulip,punchagan/zulip,andersk/zulip,ryanbackman/zulip,christi3k/zulip,hackerkid/zulip,jackrzhang/zulip,andersk/zulip,jackrzhang/zulip,jrowan/zulip,tommyip/zulip,tommyip/zulip,verma-varsha/zulip,hackerkid/zulip,showell/zulip,ryanbackman/zulip,vaidap/zulip,jrowan/zulip,showell/zulip,j831/zulip,timabbott/zulip,shubhamdhama/zulip,SmartPeople/zulip,verma-varsha/zulip,brockwhittaker/zulip,jrowan/zulip,rishig/zulip,kou/zulip,rht/zulip,aakash-cr7/zulip,vabs22/zulip,jainayush975/zulip,timabbott/zulip,brockwhittaker/zulip,jphilipsen05/zulip,synicalsyntax/zulip,andersk/zulip,j831/zulip,jrowan/zulip,zulip/zulip,tommyip/zulip,shubhamdhama/zulip,eeshangarg/zulip,jackrzhang/zulip,jphilipsen05/zulip,verma-varsha/zulip,aakash-cr7/zulip,dhcrzf/zulip,synicalsyntax/zulip,ryanbackman/zulip,tommyip/zulip,SmartPeople/zulip,brainwane/zulip,SmartPeople/zulip,brainwane/zulip,Galexrt/zulip,eeshangarg/zulip,j831/zulip,dhcrzf/zulip,jphilipsen05/zulip,SmartPeople/zulip,mahim97/zulip,punchagan/zulip,ryanbackman/zulip,kou/zulip,christi3k/zulip,rishig/zulip,jackrzhang/zulip,j831/zulip,mahim97/zulip,rishig/zulip,jackrzhang/zulip,vabs22/zulip,brockwhittaker/zulip,kou/zulip,mahim97/zulip,tommyip/zulip,aakash-cr7/zulip,mahim97/zulip,shubhamdhama/zulip,Galexrt/zulip,timabbott/zulip,timabbott/zulip,showell/zulip,rht/zulip,hackerkid/zulip,SmartPeople/zulip,zulip/zulip,brockwhittaker/zulip,zulip/zulip,rht/zulip,synicalsyntax/zulip,christi3k/zulip,aakash-cr7/zulip,amanharitsh123/zulip,synicalsyntax/zulip,amanharitsh123/zulip,kou/zulip,rishig/zulip,j831/zulip,brockwhittaker/zulip,vabs22/zulip,jackrzhang/zulip,shubhamdhama/zulip,timabbott/zulip,andersk/zulip,rht/zulip,aakash-cr7/zulip,dhcrzf/zulip,rishig/zulip,showell/zulip,punchagan/zulip,andersk/zulip,vabs22/zulip,hackerkid/zulip,amanharitsh123/zulip,zulip/zulip,rishig/zulip,dhcrzf/zulip,timabbott/zulip,jainayush975/zulip,shubhamdhama/zulip,Galexrt/zulip,vaidap/zulip,hackerkid/zulip,brockwhittaker/zulip,verma-varsha/zulip,punchagan/zulip,showell/zulip,amanharitsh123/zulip,rht/zulip,eeshangarg/zulip,vabs22/zulip