docs: update card tabs demo (#1685)

shanyuhai123 · tangjinzhou · commit e63f9ea6716d · 2020-01-15T21:11:16.000+08:00
diff --git a/components/card/demo/tabs.md b/components/card/demo/tabs.md
@@ -30,7 +30,7 @@
       @tabChange="key => onTabChange(key, 'noTitleKey')"
     >
       <p v-if="noTitleKey === 'article'">article content</p>
-      <p v-else="noTitleKey === 'app'">app content</p>
+      <p v-else-if="noTitleKey === 'app'">app content</p>
       <p v-else="noTitleKey === 'project'">project content</p>
     </a-card>
   </div>

Original file line number	Diff line number	Diff line change
`@@ -30,7 +30,7 @@`
`30`	`30`	`@tabChange="key => onTabChange(key, 'noTitleKey')"`
`31`	`31`	`>`
`32`	`32`	`<p v-if="noTitleKey === 'article'">article content</p>`
`33`		`- <p v-else="noTitleKey === 'app'">app content</p>`
	`33`	`+ <p v-else-if="noTitleKey === 'app'">app content</p>`
`34`	`34`	`<p v-else="noTitleKey === 'project'">project content</p>`
`35`	`35`	`</a-card>`
`36`	`36`	`</div>`