minor style

src/features/OnlineExam/OnlineExamHome.vue

@@ -46,7 +46,7 @@ export default {
                   欢迎使用考试系统，祝顺利完成考试！
                 </div>
                 <div style="font-weight:bold; line-height: 25px;">
-                  姓名：{this.$store.state.user.name} -
+                  姓名：{this.$store.state.user.name} -{" "}
                   {this.$store.state.user.studentCode}
                 </div>
                 <div style="font-weight:bold; line-height: 25px;">