fish: Fix test-remote-events test.

Because the shell script was missing a space, the final output test
was failing, although for some reason this didn't cause the whole test
to fail.

Fixing the missing space also revealed a bug in the test output, which
is also fixed.

fish/test-remote-events.sh

@@ -35,7 +35,7 @@ fi
 # Test close event (RHBZ#802389).
 output="$(./guestfish --remote quit)"
 
-if [ "$output" != '"closed"']; then
+if [ "$output" != "closed" ]; then
     echo "$0: close event failed:"
     echo "$output"
     exit 1