markdown: Fix the broken rendering of tables.
markdown: Fix the broken rendering of tables.

It was a regression introduced in the commit
`0d08acaa1b5713be464dfca4836e5b238f45621c`.

amanharitsh123/zulip,rishig/zulip,Galexrt/zulip,jackrzhang/zulip,tommyip/zulip,jackrzhang/zulip,brockwhittaker/zulip,vaidap/zulip,punchagan/zulip,kou/zulip,Galexrt/zulip,dhcrzf/zulip,brainwane/zulip,dhcrzf/zulip,verma-varsha/zulip,shubhamdhama/zulip,rht/zulip,mahim97/zulip,tommyip/zulip,hackerkid/zulip,Galexrt/zulip,hackerkid/zulip,brainwane/zulip,vabs22/zulip,verma-varsha/zulip,timabbott/zulip,punchagan/zulip,dhcrzf/zulip,vabs22/zulip,Galexrt/zulip,brainwane/zulip,shubhamdhama/zulip,punchagan/zulip,eeshangarg/zulip,dhcrzf/zulip,timabbott/zulip,eeshangarg/zulip,vabs22/zulip,rishig/zulip,amanharitsh123/zulip,Galexrt/zulip,rht/zulip,dhcrzf/zulip,andersk/zulip,vabs22/zulip,synicalsyntax/zulip,kou/zulip,dhcrzf/zulip,brockwhittaker/zulip,synicalsyntax/zulip,kou/zulip,showell/zulip,eeshangarg/zulip,jackrzhang/zulip,tommyip/zulip,amanharitsh123/zulip,synicalsyntax/zulip,vabs22/zulip,andersk/zulip,kou/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,Galexrt/zulip,shubhamdhama/zulip,synicalsyntax/zulip,brainwane/zulip,jackrzhang/zulip,rishig/zulip,hackerkid/zulip,rishig/zulip,tommyip/zulip,shubhamdhama/zulip,tommyip/zulip,vaidap/zulip,timabbott/zulip,andersk/zulip,eeshangarg/zulip,synicalsyntax/zulip,jackrzhang/zulip,zulip/zulip,vabs22/zulip,brockwhittaker/zulip,rishig/zulip,mahim97/zulip,kou/zulip,brockwhittaker/zulip,showell/zulip,andersk/zulip,tommyip/zulip,rht/zulip,rishig/zulip,rht/zulip,verma-varsha/zulip,brainwane/zulip,kou/zulip,amanharitsh123/zulip,andersk/zulip,zulip/zulip,hackerkid/zulip,vaidap/zulip,hackerkid/zulip,jackrzhang/zulip,mahim97/zulip,eeshangarg/zulip,rishig/zulip,verma-varsha/zulip,eeshangarg/zulip,vaidap/zulip,amanharitsh123/zulip,Galexrt/zulip,dhcrzf/zulip,zulip/zulip,rht/zulip,shubhamdhama/zulip,zulip/zulip,showell/zulip,andersk/zulip,showell/zulip,synicalsyntax/zulip,hackerkid/zulip,andersk/zulip,amanharitsh123/zulip,showell/zulip,punchagan/zulip,zulip/zulip,verma-varsha/zulip,mahim97/zulip,timabbott/zulip,mahim97/zulip,rht/zulip,mahim97/zulip,brockwhittaker/zulip,timabbott/zulip,shubhamdhama/zulip,brockwhittaker/zulip,timabbott/zulip,kou/zulip,tommyip/zulip,shubhamdhama/zulip,zulip/zulip,hackerkid/zulip,verma-varsha/zulip,synicalsyntax/zulip,eeshangarg/zulip,showell/zulip,punchagan/zulip,jackrzhang/zulip,punchagan/zulip,brainwane/zulip,rht/zulip,vaidap/zulip,vaidap/zulip,showell/zulip,brainwane/zulip