zblueslip: Simplify broken error message.
zblueslip: Simplify broken error message.

We were reporting 1 of 1 when 0 messages were
seen.

brainwane/zulip,shubhamdhama/zulip,andersk/zulip,kou/zulip,shubhamdhama/zulip,showell/zulip,shubhamdhama/zulip,kou/zulip,eeshangarg/zulip,kou/zulip,timabbott/zulip,zulip/zulip,andersk/zulip,rht/zulip,synicalsyntax/zulip,zulip/zulip,timabbott/zulip,rht/zulip,zulip/zulip,punchagan/zulip,brainwane/zulip,punchagan/zulip,punchagan/zulip,synicalsyntax/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,eeshangarg/zulip,zulip/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,hackerkid/zulip,rht/zulip,hackerkid/zulip,hackerkid/zulip,showell/zulip,andersk/zulip,timabbott/zulip,shubhamdhama/zulip,showell/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,timabbott/zulip,kou/zulip,brainwane/zulip,synicalsyntax/zulip,timabbott/zulip,shubhamdhama/zulip,punchagan/zulip,zulip/zulip,rht/zulip,synicalsyntax/zulip,brainwane/zulip,kou/zulip,brainwane/zulip,hackerkid/zulip,rht/zulip,shubhamdhama/zulip,brainwane/zulip,zulip/zulip,synicalsyntax/zulip,hackerkid/zulip,punchagan/zulip,punchagan/zulip,timabbott/zulip,kou/zulip,shubhamdhama/zulip,rht/zulip,eeshangarg/zulip,synicalsyntax/zulip,eeshangarg/zulip,showell/zulip,showell/zulip,andersk/zulip,showell/zulip,synicalsyntax/zulip,timabbott/zulip,rht/zulip,kou/zulip,eeshangarg/zulip,andersk/zulip