test_notifications: Fix confusing variable naming in test_unread_anchor.
test_notifications: Fix confusing variable naming in test_unread_anchor.

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