[CodeStyle][Xdoctest][254-256] Fix example code(paddle.text.Imdb,paddle.text.Movielens,paddle.text.UCIHousing)

[Z784555]

PR Category

User Experience

PR Types

Improvements

Description

修复以下 API 的示例代码，适配 xdoctest 自动测试：

1. paddle.text.Imdb：移除不支持的 +TIMEOUT 指令，修改预期输出为paddle.Size格式；
2. paddle.text.Movielens：移除不支持的 +TIMEOUT 指令，修改预期输出为paddle.Size格式；
3. paddle.text.UCIHousing：修改预期输出为paddle.Size格式。
4. 上面示例代码对应 API Docstring 中的 .. code-block:: python 修改为 .. code-block:: pycon

修改后的示例代码已通过本地 xdoctest 验证，无运行报错，输出匹配。

Related links

• 📝 文档示例代码修复任务 #76545

@ooooo-create

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[ooooo-create]

为什么把这些 +TIMEOUT(75) 删了，你可以看看 static-check 流水线的日志，删掉之后会超时，issue 里面有 书写规范，下同，这是给 ci 看的

[Z784555]

已恢复>>> # doctest: +TIMEOUT(75)
感谢提醒！之前因本地 xdoctest 解析警告误删了UserWarning: Unknown directive: '+TIMEOUT'

[ooooo-create]

LGTM

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