Remove trailing whitespace from master config

salt/files/master.d/f_defaults.conf

 {{ get_config('minion_data_cache', 'True') }}
 
 # Store all returns in the given returner.
-# Setting this option requires that any returner-specific configuration also 
+# Setting this option requires that any returner-specific configuration also
 # be set. See various returners in salt/returners for details on required
 # configuration values. (See also, event_return_queue below.)
 #
 # the key rotation event as minions reconnect. Consider this carefully if this
 # salt master is managing a large number of minions.
 #
-# If disabled, it is recommended to handle this event by listening for the 
+# If disabled, it is recommended to handle this event by listening for the
 # 'aes_key_rotate' event with the 'key' tag and acting appropriately.
 {{ get_config('ping_on_rotate', 'False') }}
 
 # By default, the master deletes its cache of minion data when the key for that
-# minion is removed. To preserve the cache after key deletion, set 
+# minion is removed. To preserve the cache after key deletion, set
 # 'preserve_minion_cache' to True.
 #
 # WARNING: This may have security implications if compromised minions auth with
 {% endif %}
 
 # Enforce client_acl & client_acl_blacklist when users have sudo
-# access to the salt command. 
+# access to the salt command.
 #
 {{ get_config('sudo_acl', 'False') }}
 
 # the master server. The default is md5, but sha1, sha224, sha256, sha384
 # and sha512 are also supported.
 #
-# Prior to changing this value, the master should be stopped and all Salt 
+# Prior to changing this value, the master should be stopped and all Salt
 # caches should be cleared.
 {{ get_config('hash_type', 'md5') }}