[Refactor] Use mdformat instead of markdownlint to format markdown.

.github/ISSUE_TEMPLATE/----.md

@@ -4,27 +4,30 @@ about: 遇到问题并寻求帮助
 title: ''
 labels: help wanted
 assignees: ''
-
 ---
 
 推荐使用英语模板 General question，以便你的问题帮助更多人。
 
 ### 首先确认以下内容
+
 - 我已经查询了相关的 issue，但没有找到需要的帮助。
 - 我已经阅读了相关文档，但仍不知道如何解决。
 
 ### 描述你遇到的问题
 
-[填写这里]
+\[填写这里\]
 
 ### 相关信息
+
 1. `pip list | grep "mmcv\|mmcls\|^torch"` 命令的输出
-[填写这里]
+   \[填写这里\]
 2. 如果你修改了，或者使用了新的配置文件，请在这里写明
+
 ```python
 [填写这里]
 ```
+
 3. 如果你是在训练过程中遇到的问题，请填写完整的训练日志和报错信息
-[填写这里]
+   \[填写这里\]
 4. 如果你对 `mmcls` 文件夹下的代码做了其他相关的修改，请在这里写明
-[填写这里]
+   \[填写这里\]

.github/ISSUE_TEMPLATE/---.md

@@ -1,32 +1,34 @@
 ---
 name: 新功能
 about: 为项目提一个建议
-title: "[Feature]"
+title: '[Feature]'
 labels: enhancement
 assignees: ''
-
 ---
 
 推荐使用英语模板 Feature request，以便你的问题帮助更多人。
 
 ### 描述这个功能
 
-[填写这里]
+\[填写这里\]
 
 ### 动机
+
 请简要说明以下为什么需要添加这个新功能
 例 1. 现在进行 xxx 的时候不方便
 例 2. 最近的论文中提出了有一个很有帮助的 xx
 
-[填写这里]
+\[填写这里\]
 
 ### 相关资源
+
 是否有相关的官方实现或者第三方实现？这些会很有参考意义。
 
-[填写这里]
+\[填写这里\]
 
 ### 其他相关信息
+
 其他和这个功能相关的信息或者截图，请放在这里。
 另外如果你愿意参与实现这个功能并提交 PR，请在这里说明，我们将非常欢迎。
 
-[填写这里]
+\[填写这里\]

.github/ISSUE_TEMPLATE/---bug.md

@@ -1,39 +1,44 @@
 ---
 name: 报告 Bug
 about: 报告问题以帮助我们提升
-title: "[Bug]"
+title: '[Bug]'
 labels: bug
 assignees: ''
-
 ---
 
 推荐使用英语模板 Bug report，以便你的问题帮助更多人。
 
 ### 描述 bug
+
 简单地描述一下遇到了什么 bug
 
-[填写这里]
+\[填写这里\]
 
 ### 复现流程
+
 在命令行中执行的详细操作
 
 ```shell
 [填写这里]
 ```
 
 ### 相关信息
+
 1. `pip list | grep "mmcv\|mmcls\|^torch"` 命令的输出
-[填写这里]
+   \[填写这里\]
 2. 如果你修改了，或者使用了新的配置文件，请在这里写明
+
 ```python
 [填写这里]
 ```
+
 3. 如果你是在训练过程中遇到的问题，请填写完整的训练日志和报错信息
-[填写这里]
+   \[填写这里\]
 4. 如果你对 `mmcls` 文件夹下的代码做了其他相关的修改，请在这里写明
-[填写这里]
+   \[填写这里\]
 
 ### 附加内容
+
 任何其他有关该 bug 的信息、截图等
 
-[填写这里]
+\[填写这里\]

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,37 +1,42 @@
 ---
 name: Bug report
 about: Create a report to help us improve
-title: "[Bug]"
+title: '[Bug]'
 labels: bug
 assignees: ''
-
 ---
 
 ### Describe the bug
+
 A clear and concise description of what the bug is.
 
-[here]
+\[here\]
 
 ### To Reproduce
+
 The command you executed.
 
 ```shell
 [here]
 ```
 
 ### Post related information
+
 1. The output of `pip list | grep "mmcv\|mmcls\|^torch"`
-[here]
+   \[here\]
 2. Your config file if you modified it or created a new one.
+
 ```python
 [here]
 ```
+
 3. Your train log file if you meet the problem during training.
-[here]
+   \[here\]
 4. Other code you modified in the `mmcls` folder.
-[here]
+   \[here\]
 
 ### Additional context
+
 Add any other context about the problem here.
 
-[here]
+\[here\]

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,30 +1,32 @@
 ---
 name: Feature request
 about: Suggest an idea for this project
-title: "[Feature]"
+title: '[Feature]'
 labels: enhancement
 assignees: ''
-
 ---
 
 ### Describe the feature
 
-[here]
+\[here\]
 
 ### Motivation
+
 A clear and concise description of the motivation of the feature.
-Ex1. It is inconvenient when [....].
-Ex2. There is a recent paper [....], which is very helpful for [....].
+Ex1. It is inconvenient when \[....\].
+Ex2. There is a recent paper \[....\], which is very helpful for \[....\].
 
-[here]
+\[here\]
 
 ### Related resources
+
 If there is an official code release or third-party implementation, please also provide the information here, which would be very helpful.
 
-[here]
+\[here\]
 
 ### Additional context
+
 Add any other context or screenshots about the feature request here.
 If you would like to implement the feature and create a PR, please leave a comment here and that would be much appreciated.
 
-[here]
+\[here\]

.github/ISSUE_TEMPLATE/general-questions.md

@@ -4,25 +4,28 @@ about: 'Ask general questions to get help '
 title: ''
 labels: help wanted
 assignees: ''
-
 ---
 
 ### Checklist
+
 - I have searched related issues but cannot get the expected help.
 - I have read related documents and don't know what to do.
 
 ### Describe the question you meet
 
-[here]
+\[here\]
 
 ### Post related information
+
 1. The output of `pip list | grep "mmcv\|mmcls\|^torch"`
-[here]
+   \[here\]
 2. Your config file if you modified it or created a new one.
+
 ```python
 [here]
 ```
+
 3. Your train log file if you meet the problem during training.
-[here]
+   \[here\]
 4. Other code you modified in the `mmcls` folder.
-[here]
+   \[here\]

.pre-commit-config.yaml

@@ -25,12 +25,15 @@ repos:
         args: ["--remove"]
       - id: mixed-line-ending
         args: ["--fix=lf"]
-  - repo: https://github.com/markdownlint/markdownlint
-    rev: v0.11.0
-    hooks:
-      - id: markdownlint
-        args: ["-r", "~MD002,~MD013,~MD029,~MD033,~MD034",
-              "-t", "allow_different_nesting"]
+  - repo: https://github.com/executablebooks/mdformat
+    rev: 0.7.9
+    hooks:
+      - id: mdformat
+        args: ["--number", "--table-width", "200"]
+        additional_dependencies:
+          - mdformat-openmmlab
+          - mdformat_frontmatter
+          - linkify-it-py
   - repo: https://github.com/codespell-project/codespell
     rev: v2.1.0
     hooks:

CONTRIBUTING.md

@@ -0,0 +1,61 @@
+# Contributing to OpenMMLab
+
+All kinds of contributions are welcome, including but not limited to the following.
+
+- Fix typo or bugs
+- Add documentation or translate the documentation into other languages
+- Add new features and components
+
+## Workflow
+
+1. fork and pull the latest OpenMMLab repository (MMClassification)
+2. checkout a new branch (do not use master branch for PRs)
+3. commit your changes
+4. create a PR
+
+```{note}
+If you plan to add some new features that involve large changes, it is encouraged to open an issue for discussion first.
+```
+
+## Code style
+
+### Python
+
+We adopt [PEP8](https://www.python.org/dev/peps/pep-0008/) as the preferred code style.
+
+We use the following tools for linting and formatting:
+
+- [flake8](https://github.com/PyCQA/flake8): A wrapper around some linter tools.
+- [isort](https://github.com/timothycrosley/isort): A Python utility to sort imports.
+- [yapf](https://github.com/google/yapf): A formatter for Python files.
+- [codespell](https://github.com/codespell-project/codespell): A Python utility to fix common misspellings in text files.
+- [mdformat](https://github.com/executablebooks/mdformat): Mdformat is an opinionated Markdown formatter that can be used to enforce a consistent style in Markdown files.
+- [docformatter](https://github.com/myint/docformatter): A formatter to format docstring.
+
+Style configurations can be found in [setup.cfg](./setup.cfg).
+
+We use [pre-commit hook](https://pre-commit.com/) that checks and formats for `flake8`, `yapf`, `isort`, `trailing whitespaces`, `markdown files`,
+fixes `end-of-files`, `double-quoted-strings`, `python-encoding-pragma`, `mixed-line-ending`, sorts `requirments.txt` automatically on every commit.
+The config for a pre-commit hook is stored in [.pre-commit-config](https://github.com/open-mmlab/mmclassification/blob/master/.pre-commit-config.yaml).
+
+After you clone the repository, you will need to install initialize pre-commit hook.
+
+```shell
+pip install -U pre-commit
+```
+
+From the repository folder
+
+```shell
+pre-commit install
+```
+
+After this on every commit check code linters and formatter will be enforced.
+
+```{important}
+Before you create a PR, make sure that your code lints and is formatted by yapf.
+```
+
+### C++ and CUDA
+
+We follow the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html).

README.md

@@ -1,6 +1,6 @@
 <div align="center">
 
-  <img src="resources/mmcls-logo.png" width="600"/>
+<img src="resources/mmcls-logo.png" width="600"/>
   <div>&nbsp;</div>
   <div align="center">
     <b><font size="5">OpenMMLab website</font></b>
@@ -19,20 +19,19 @@
   </div>
   <div>&nbsp;</div>
 
+[![PyPI](https://img.shields.io/pypi/v/mmcls)](https://pypi.org/project/mmcls)
+[![Docs](https://img.shields.io/badge/docs-latest-blue)](https://mmclassification.readthedocs.io/en/latest/)
+[![Build Status](https://github.com/open-mmlab/mmclassification/workflows/build/badge.svg)](https://github.com/open-mmlab/mmclassification/actions)
+[![codecov](https://codecov.io/gh/open-mmlab/mmclassification/branch/master/graph/badge.svg)](https://codecov.io/gh/open-mmlab/mmclassification)
+[![license](https://img.shields.io/github/license/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/blob/master/LICENSE)
+[![open issues](https://isitmaintained.com/badge/open/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/issues)
+[![issue resolution](https://isitmaintained.com/badge/resolution/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/issues)
 
-  [![PyPI](https://img.shields.io/pypi/v/mmcls)](https://pypi.org/project/mmcls)
-  [![Docs](https://img.shields.io/badge/docs-latest-blue)](https://mmclassification.readthedocs.io/en/latest/)
-  [![Build Status](https://github.com/open-mmlab/mmclassification/workflows/build/badge.svg)](https://github.com/open-mmlab/mmclassification/actions)
-  [![codecov](https://codecov.io/gh/open-mmlab/mmclassification/branch/master/graph/badge.svg)](https://codecov.io/gh/open-mmlab/mmclassification)
-  [![license](https://img.shields.io/github/license/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/blob/master/LICENSE)
-  [![open issues](https://isitmaintained.com/badge/open/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/issues)
-  [![issue resolution](https://isitmaintained.com/badge/resolution/open-mmlab/mmclassification.svg)](https://github.com/open-mmlab/mmclassification/issues)
-
-  [📘 Documentation](https://mmclassification.readthedocs.io/en/latest/) |
-  [🛠️ Installation](https://mmclassification.readthedocs.io/en/latest/install.html) |
-  [👀 Model Zoo](https://mmclassification.readthedocs.io/en/latest/model_zoo.html) |
-  [🆕 Update News](https://mmclassification.readthedocs.io/en/latest/changelog.html) |
-  [🤔 Reporting Issues](https://github.com/open-mmlab/mmclassification/issues/new/choose)
+[📘 Documentation](https://mmclassification.readthedocs.io/en/latest/) |
+[🛠️ Installation](https://mmclassification.readthedocs.io/en/latest/install.html) |
+[👀 Model Zoo](https://mmclassification.readthedocs.io/en/latest/model_zoo.html) |
+[🆕 Update News](https://mmclassification.readthedocs.io/en/latest/changelog.html) |
+[🤔 Reporting Issues](https://github.com/open-mmlab/mmclassification/issues/new/choose)
 
 </div>
 
@@ -61,13 +60,15 @@ The master branch works with **PyTorch 1.5+**.
 
 v0.23.0 was released in 1/5/2022.
 Highlights of the new version:
+
 - Support **DenseNet**, **VAN** and **PoolFormer**, and provide pre-trained models.
 - Support training on IPU.
 - New style API docs, welcome [view it](https://mmclassification.readthedocs.io/en/master/api/models.html).
 
 v0.22.0 was released in 30/3/2022.
 
 Highlights of the new version:
+
 - Support a series of **CSP Network**, such as CSP-ResNet, CSP-ResNeXt and CSP-DarkNet.
 - A new `CustomDataset` class to help you **build dataset of yourself**!
 - Support new backbones - **ConvMixer**, **RepMLP** and new dataset - **CUB dataset**.