[config] don't save config on set

Fixes beat.editor#277

beat/cmdline/config.py

@@ -114,7 +114,7 @@ class Configuration(object):
 
         return dict((k, self.__data[k]) for k in self.__data if self.is_database_key(k))
 
-    def set(self, key, value, local=False):
+    def set(self, key, value):
         """Sets or resets a field in the configuration"""
 
         if not self._is_valid_key(key):
@@ -126,8 +126,6 @@ class Configuration(object):
         elif key in DEFAULTS:
             self.__data[key] = DEFAULTS[key]
 
-        self.save(local)
-
     def save(self, local=False):
         """Saves contents to configuration file
 
@@ -256,6 +254,7 @@ def set(ctx, args, local):
 
     try:
         for idx in range(0, len(args), 2):
-            ctx.meta["config"].set(args[idx], args[idx + 1], local)
+            ctx.meta["config"].set(args[idx], args[idx + 1])
+        ctx.meta["config"].save(local)
     except Exception:
         raise click.ClickException("Failed to change the configuration.")