* source. Valid sources identifiers are "udev" and "kernel".
*
* Applications should usually not connect directly to the
- * "kernel" events, because the devices might not be useable
+ * "kernel" events, because the devices might not be usable
* at that time, before udev has configured them, and created
* device nodes. Accessing devices at the same time as udev,
* might result in unpredictable behavior. The "udev" events