Fixes testsuite:

- Fix get_hosts_avahi() if avahi-browse not available
- Removed test "Tab should complete hostnames" from finger since it's
  returning (for the moment) undetectable ip-addresses from known_hosts
  files.  Furthermore the next test "Tab should complete partial
  hostname" is testing the same.

test/lib/completions/finger.exp

@@ -30,19 +30,6 @@ assert_complete_partial [exec bash -c "compgen -A user"] "finger"
 sync_after_int
 
 
-set test "Tab should complete hostnames"
-# Build string list of hostnames
-set hosts {}
-foreach h [get_hosts] {
-    # Prefix hosts with username 'test@'
-    lappend hosts "test@$h"
-}; # foreach
-assert_complete_partial $hosts finger test@ $test
-
-
-sync_after_int
-
-
 set test "Tab should complete partial hostname"
 # Build string list of hostnames, starting with the character of the first
 # host.

test/lib/library.exp

@@ -311,10 +311,15 @@ proc get_hosts {} {
 # Get hostnames according to avahi
 # @return list  Hostnames
 proc get_hosts_avahi {} {
-    set hosts [exec bash -c {
+        # Retrieving hosts is successful?
+    if { [catch {exec bash -c {
         type avahi-browse >&/dev/null && [ -n "$(pidof avahi-daemon)" ]
-            avahi-browse -cpr _workstation._tcp | grep ^= | cut -d\; -f7 | sort -u
+            && avahi-browse -cpr _workstation._tcp | grep ^= | cut -d\; -f7 | sort -u
-    }]
+    }} hosts] } {
+        # No, retrieving hosts yields error;
+            # Reset hosts
+        set hosts {}
+    }; # if
     return $hosts
 }; # get_hosts_avahi()