Device scanner documentation fixes.
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@ -89,10 +89,12 @@ Alternatively, you can use KPMcore device scanner which also finds
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LVM Volume Groups.
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```
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DeviceScanner *deviceScanner = new DeviceScanner(this, operationStack()))
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// First create operationStack with another QObject as parent.
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OperationStack *operationStack = new OperationStack(parent);
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DeviceScanner *deviceScanner = new DeviceScanner(parent, *operationStack));
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deviceScanner->start();
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```
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The `deviceScanner` scans for the devices in a background thread. After
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scanning is complete `DeviceScanner::finished()` signal will be emitted.
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Then the devices can accessed using `operationStack().previewDevices()`.
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Then the devices can accessed using `operationStack->previewDevices()`.
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