populate_db: Fix help text for --test-suite.
populate_db: Fix help text for --test-suite.

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