Quote device name string when grabbing/ungrabbing (#160)

* Quote device name string when grabbing/ungrabbing

It can be confusing when the device name string includes something generic like 'keyboard', which can seem like just part of the logging. Quotes around the actual device name string when grabbing or ungrabbing the device will alleviate this. 

Example using my keyboard device name: 

(+K) Grabbing AT Translated Set 2 keyboard (/dev/input/event4)

(+K) Grabbing 'AT Translated Set 2 keyboard' (/dev/input/event4)

The device name is not 'AT Translated Set 2', which might be a natural assumption, but 'AT Translated Set 2 keyboard', which will be made clearer by adding the quotes.

* Remove colon from "Ungrabbing: " logging

Removing colon from "Ungrabbing: " log messages to match with "Grabbing " log message.

src/keyszer/devices.py

@@ -81,7 +81,7 @@ def autodetect(self):
             self.grab(device)
 
     def grab(self, device):
-        info(f"Grabbing {device.name} ({device.fn})", ctx="+K")
+        info(f"Grabbing '{device.name}' ({device.fn})", ctx="+K")
         self._loop.add_reader(device, self._input_cb, device)
         self._devices.append(device)
         try:
@@ -93,7 +93,7 @@ def grab(self, device):
             raise DeviceGrabError()
 
     def ungrab(self, device):
-        info(f"Ungrabbing: {device.name} (removed)", ctx="-K")
+        info(f"Ungrabbing '{device.name}' (removed)", ctx="-K")
         self._loop.remove_reader(device)
         self._devices.remove(device)
         try:
@@ -105,7 +105,7 @@ def ungrab_by_filename(self, fn):
         for device in self._devices:
             try:
                 if device.fn == fn:
-                    info(f"Ungrabbing: {device.name} (removed)", ctx="-K")
+                    info(f"Ungrabbing '{device.name}' (removed)", ctx="-K")
                     self._loop.remove_reader(device)
                     self._devices.remove(device)
                     device.ungrab()