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README.md

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+# Document Editing Sample
+
+This is an example that shows you how to create a command which makes changes to the document in the active editor.
+
+## Demo
+
+![demo](demo.gif)
+
+## VS Code API
+
+### `vscode` module
+
+- [`commands.registerCommand`](https://code.visualstudio.com/api/references/vscode-api#commands.registerCommand)
+- [`window.activeTextEditor`](https://code.visualstudio.com/api/references/vscode-api#window.activeTextEditor)
+- [`TextDocument.getText`](https://code.visualstudio.com/api/references/vscode-api#TextDocument.getText)
+- [`TextEditor.edit`](https://code.visualstudio.com/api/references/vscode-api#TextEditor.edit)
+- [`TextEditorEdit`](https://code.visualstudio.com/api/references/vscode-api#TextEditorEdit)
+
+### Contribution Points
+
+- [`contributes.commands`](https://code.visualstudio.com/api/references/contribution-points#contributes.commands)
+
+## Running the Sample
+
+- Run `npm install` in terminal to install dependencies
+- Run the `Run Extension` target in the Debug View. This will:
+	- Start a task `npm: watch` to compile the code
+	- Run the extension in a new VS Code window