refactor(ui): remove extra newline characters (doesn't need anymore)

Author: A7Lavinraj

lua/assistant/ui/init.lua

@@ -298,8 +298,6 @@ function M.edit()
 
     state.set_by_key("tests", function(value)
       value[test_id].input, value[test_id].output = utils.text_to_io(lines)
-      value[test_id].input = value[test_id].input .. "\n"
-      value[test_id].output = value[test_id].output .. "\n"
       return value
     end)