frappy.show: do not show nicos column if equal to frappy

devices.py

@@ -211,6 +211,8 @@ class FrappyConfig(Device):
             cfgs = current_cfgs
         fm = FrappyManager()
         proposed = fm.get_server_state(config.instrument, cfgs)
+        if fm.error:
+            self.log.error('%s', fm.error)
         changes = dict(proposed)
         need_change = False
         for service in SERVICES:
@@ -407,13 +409,17 @@ class FrappyConfig(Device):
         session.log.info('  %s', 75*'_')
         session.log.info(' ')
         kwargs = {}
+        frappy_equals_given = True
         rows = [['service', 'sea', 'frappy', 'nicos', 'proposed'], [''] * 5]
         for service in SERVICES:
             cfg = changes.get(service)
-            if not (cfg is None or isinstance(cfg, Keep)):
-                kwargs[service] = str(cfg)
             frappy_cfg = fm.frappy_cfgs.get(service, '-')
             prev = self._target_cfgs.get(service, '-')
+            if not (cfg is None or isinstance(cfg, Keep)):
+                kwargs[service] = str(cfg)
+                frappy_equals_given = False
+            elif frappy_cfg != prev:
+                frappy_equals_given = False
             rows.append([service, fm.sea_cfgs.get(service, '-'), frappy_cfg,
                          prev, '-' if cfg is None else cfg])
         try:
@@ -424,6 +430,8 @@ class FrappyConfig(Device):
         for row in rows:
             if not kwargs:
                 row.pop()
+                if frappy_equals_given:
+                    row.pop()
             session.log.info('  %s', '  '.join(v.ljust(w) for w, v in zip(wid, row)))
         if self._rebuild_env:
             session.log.info('  %s', self._rebuild_env)