Remove trailing spaces from translatable strings

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>

tools/virt-admin.c

@@ -501,7 +501,7 @@ cmdSrvThreadpoolSet(vshControl *ctl, const vshCmd *cmd)
     if (!nparams) {
         vshError(ctl, "%s",
                  _("At least one of options --min-workers, --max-workers, "
-                   "--priority-workers is mandatory "));
+                   "--priority-workers is mandatory"));
             goto cleanup;
     }