test-all: Fix buggy PYTHONWARNINGS invocation.
test-all: Fix buggy PYTHONWARNINGS invocation.

Shell only sets variables if they're the first thing on a line.

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