```coffeescript
"*":
  "autocomplete-plus":
    confirmCompletion: "enter"
    fileBlacklist: [
      "*.md"
      "*.txt"
    ]
  core:
    telemetryConsent: "limited"
  editor:
    softTabs: false
    tabLength: 4
  "exception-reporting":
    userId: "2c613f71-39b8-42c5-bef0-f61d264be689"
  "git-diff":
    showIconsInEditorGutter: true
  "line-ending-selector":
    defaultLineEnding: "LF"
  "markdown-preview":
    useGitHubStyle: true
  tabs:
    enableVcsColoring: true
  "tree-view":
    alwaysOpenExisting: true
  whitespace: {}
".plain.text":
  editor:
    tabLength: 8
```

Change tab length in GFM.
user
```coffeescript
"*":
  "autocomplete-plus":
    confirmCompletion: "enter"
    fileBlacklist: [
      "*.md"
      "*.txt"
    ]
  core:
    telemetryConsent: "limited"
  editor:
    softTabs: false
    tabLength: 4
  "exception-reporting":
    userId: "2c613f71-39b8-42c5-bef0-f61d264be689"
  "git-diff":
    showIconsInEditorGutter: true
  "line-ending-selector":
    defaultLineEnding: "LF"
  "markdown-preview":
    useGitHubStyle: true
  tabs:
    enableVcsColoring: true
  "tree-view":
    alwaysOpenExisting: true
  whitespace: {}
".gfm.source":
  editor:
    tabLength: 8
".plain.text":
  editor:
    tabLength: 8
```
assistant