Cannot correctly base64 decode the content of the file, when using github api (fine-graned token)

[andrei-anissimov]

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Bug

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I am using github api to pull the script file from a private repository using fine-graned token.

curl -s -L \
  -H "Accept: application/vnd.github+json" \
  -H "Authorization: Bearer <my-api-token>" \
  -H "X-GitHub-Api-Version: 2022-11-28" \
  https://api.github.com/repos/andrei-anissimov/linux-scripts/contents/lfs_requirements_check.sh

I get a valid response:

{
  "name": "lfs_requirements_check.sh",
  "path": "lfs_requirements_check.sh",
  "sha": "b53d41fd4b1c9881985c9d58d328ddd9459c234e",
  "size": 2786,
  "url": "https://api.github.com/repos/andrei-anissimov/linux-scripts/contents/lfs_requirements_check.sh?ref=main",
  "html_url": "https://github.com/andrei-anissimov/linux-scripts/blob/main/lfs_requirements_check.sh",
  "git_url": "https://api.github.com/repos/andrei-anissimov/linux-scripts/git/blobs/b53d41fd4b1c9881985c9d58d328ddd9459c234e",
  "download_url": "https://raw.githubusercontent.com/andrei-anissimov/linux-scripts/main/lfs_requirements_check.sh?token=AAHFZZCXMW4EOHDMQV5HRRDF46ESE",
  "type": "file",
  "content": "IyEvYmluL2Jhc2gKIyBBIHNjcmlwdCB0byBsaXN0IHZlcnNpb24gbnVtYmVy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\nJChucHJvYykgbG9naWNhbCBjb3JlcyBhcmUgYXZhaWxhYmxlIgpmaQo=\n",
  "encoding": "base64",
  "_links": {
    "self": "https://api.github.com/repos/andrei-anissimov/linux-scripts/contents/lfs_requirements_check.sh?ref=main",
    "git": "https://api.github.com/repos/andrei-anissimov/linux-scripts/git/blobs/b53d41fd4b1c9881985c9d58d328ddd9459c234e",
    "html": "https://github.com/andrei-anissimov/linux-scripts/blob/main/lfs_requirements_check.sh"
  }
}

However, when I try to base64 --decode the content field or use any online decodeing tool the result contains unreadable characters (meaning the script is corrupted and cannot execute).