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	update readme for v3 (#708)
* update readme for v3 * update readme with changes * nit grammar
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					@ -2,7 +2,7 @@
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  <a href="https://github.com/actions/checkout"><img alt="GitHub Actions status" src="https://github.com/actions/checkout/workflows/test-local/badge.svg"></a>
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					  <a href="https://github.com/actions/checkout"><img alt="GitHub Actions status" src="https://github.com/actions/checkout/workflows/test-local/badge.svg"></a>
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</p>
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					</p>
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# Checkout V2
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					# Checkout V3
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This action checks-out your repository under `$GITHUB_WORKSPACE`, so your workflow can access it.
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					This action checks-out your repository under `$GITHUB_WORKSPACE`, so your workflow can access it.
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					@ -14,27 +14,14 @@ When Git 2.18 or higher is not in your PATH, falls back to the REST API to downl
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# What's new
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					# What's new
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- Improved performance
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					- Updated to the node16 runtime by default
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  - Fetches only a single commit by default
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					  - This requires a minimum [Actions Runner](https://github.com/actions/runner/releases/tag/v2.285.0) version of v2.285.0 to run, which is by default available in GHES 3.4 or later.
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- Script authenticated git commands
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  - Auth token persisted in the local git config
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- Supports SSH
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- Creates a local branch
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  - No longer detached HEAD when checking out a branch
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- Improved layout
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  - The input `path` is always relative to $GITHUB_WORKSPACE
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  - Aligns better with container actions, where $GITHUB_WORKSPACE gets mapped in
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- Fallback to REST API download
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  - When Git 2.18 or higher is not in the PATH, the REST API will be used to download the files
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  - When using a job container, the container's PATH is used
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Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous versions.
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# Usage
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					# Usage
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<!-- start usage -->
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					<!-- start usage -->
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```yaml
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					```yaml
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- uses: actions/checkout@v2
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					- uses: actions/checkout@v3
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  with:
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					  with:
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    # Repository name with owner. For example, actions/checkout
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					    # Repository name with owner. For example, actions/checkout
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    # Default: ${{ github.repository }}
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					    # Default: ${{ github.repository }}
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					@ -123,7 +110,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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## Fetch all history for all tags and branches
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					## Fetch all history for all tags and branches
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```yaml
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					```yaml
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- uses: actions/checkout@v2
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					- uses: actions/checkout@v3
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  with:
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					  with:
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    fetch-depth: 0
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					    fetch-depth: 0
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```
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					```
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					@ -131,7 +118,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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## Checkout a different branch
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					## Checkout a different branch
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```yaml
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					```yaml
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- uses: actions/checkout@v2
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					- uses: actions/checkout@v3
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  with:
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					  with:
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    ref: my-branch
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					    ref: my-branch
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```
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					```
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					@ -139,7 +126,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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## Checkout HEAD^
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					## Checkout HEAD^
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```yaml
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					```yaml
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- uses: actions/checkout@v2
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					- uses: actions/checkout@v3
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  with:
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					  with:
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    fetch-depth: 2
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					    fetch-depth: 2
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- run: git checkout HEAD^
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					- run: git checkout HEAD^
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					@ -149,12 +136,12 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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```yaml
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					```yaml
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- name: Checkout
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					- name: Checkout
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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  with:
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					  with:
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    path: main
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					    path: main
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- name: Checkout tools repo
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					- name: Checkout tools repo
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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  with:
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					  with:
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    repository: my-org/my-tools
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					    repository: my-org/my-tools
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    path: my-tools
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					    path: my-tools
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					@ -164,10 +151,10 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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```yaml
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					```yaml
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- name: Checkout
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					- name: Checkout
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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- name: Checkout tools repo
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					- name: Checkout tools repo
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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  with:
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					  with:
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    repository: my-org/my-tools
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					    repository: my-org/my-tools
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    path: my-tools
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					    path: my-tools
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					@ -177,12 +164,12 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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```yaml
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					```yaml
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- name: Checkout
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					- name: Checkout
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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  with:
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					  with:
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    path: main
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					    path: main
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- name: Checkout private tools
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					- name: Checkout private tools
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  uses: actions/checkout@v2
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					  uses: actions/checkout@v3
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  with:
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					  with:
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    repository: my-org/my-private-tools
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					    repository: my-org/my-private-tools
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    token: ${{ secrets.GH_PAT }} # `GH_PAT` is a secret that contains your PAT
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					    token: ${{ secrets.GH_PAT }} # `GH_PAT` is a secret that contains your PAT
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					@ -195,7 +182,7 @@ Refer [here](https://github.com/actions/checkout/blob/v1/README.md) for previous
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## Checkout pull request HEAD commit instead of merge commit
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					## Checkout pull request HEAD commit instead of merge commit
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```yaml
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					```yaml
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- uses: actions/checkout@v2
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					- uses: actions/checkout@v3
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  with:
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					  with:
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    ref: ${{ github.event.pull_request.head.sha }}
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					    ref: ${{ github.event.pull_request.head.sha }}
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```
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					```
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					@ -211,7 +198,7 @@ jobs:
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  build:
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					  build:
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    runs-on: ubuntu-latest
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					    runs-on: ubuntu-latest
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    steps:
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					    steps:
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      - uses: actions/checkout@v2
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					      - uses: actions/checkout@v3
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```
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					```
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## Push a commit using the built-in token
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					## Push a commit using the built-in token
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					@ -222,7 +209,7 @@ jobs:
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  build:
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					  build:
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    runs-on: ubuntu-latest
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					    runs-on: ubuntu-latest
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    steps:
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					    steps:
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      - uses: actions/checkout@v2
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					      - uses: actions/checkout@v3
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      - run: |
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					      - run: |
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          date > generated.txt
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					          date > generated.txt
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          git config user.name github-actions
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					          git config user.name github-actions
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					@ -120,7 +120,7 @@ function updateUsage(
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}
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					}
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updateUsage(
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					updateUsage(
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  'actions/checkout@v2',
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					  'actions/checkout@v3',
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  path.join(__dirname, '..', '..', 'action.yml'),
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					  path.join(__dirname, '..', '..', 'action.yml'),
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  path.join(__dirname, '..', '..', 'README.md')
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					  path.join(__dirname, '..', '..', 'README.md')
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)
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					)
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