Calling `TextEditorEdit.replace` to replace a line of text introduces a partial selection of the new text

<!-- ⚠️⚠️ Do Not Delete This! bug_report_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- 🕮 Read our guide about submitting issues: https://github.com/microsoft/vscode/wiki/Submitting-Bugs-and-Suggestions --> <!-- 🔎 Search existing issues to avoid creating duplicates. --> <!-- 🧪 Test using the latest Insiders build to see if your issue has already been fixed: https://code.visualstudio.com/insiders/ --> <!-- 💡 Instead of creating your report here, use 'Report Issue' from the 'Help' menu in VS Code to pre-fill useful information. --> <!-- 🔧 Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled?: No, but expected because this is a bug with the extension API <!-- 🪓 If you answered No above, use 'Help: Start Extension Bisect' from Command Palette to try to identify the cause. --> <!-- 📣 Issues caused by an extension need to be reported directly to the extension publisher. The 'Help > Report Issue' dialog can assist with this. --> Version: 1.56.2 Commit: 054a9295330880ed74ceaedda236253b4f39a335 Date: 2021-05-12T16:44:45.182Z Electron: 12.0.4 Chrome: 89.0.4389.114 Node.js: 14.16.0 V8: 8.9.255.24-electron.0 OS: Linux arm 5.10.17-v7l+ Note: Reproduces on all OS's Steps to Reproduce: 1. From an extension, create a command to run the following code: ```js function myCommand () { return new Promise((resolve, reject) => { const editor = vscode.window.activeTextEditor; const {range} = editor.document.lineAt(0); return editor.edit((editBuilder) => { editBuilder.replace(range, "abcdef"); }).then(resolve, reject); }); } ``` 2. With that extension loaded, create a new document and type "123" as the only text, leaving the cursor after the 3 3. Invoke the above command via `Ctrl+Shift+P` Expected: Document text is "abcdef", cursor is after the 'f', no selection is present Actual: Document text is "abcdef", cursor i…