Examples of existing commands with colons:

/list
2013-03-10 14:40:26 [INFO] There are 0/20 players online:
2013-03-10 14:40:26 [INFO]

/banlist
2013-03-10 14:41:02 [INFO] There are 2 total banned players:
2013-03-10 14:41:02 [INFO] badplayer1 and badplayer2

/whitelist list
2013-03-10 14:41:35 [INFO] There are 5 (out of 2 seen) whitelisted players:
2013-03-10 14:41:35 [INFO] player1, player2, admin1, admin2, and admin3


Examples without colons:

/scoreboard players list
2013-03-10 14:43:44 [INFO] Showing 2 tracked players on the scoreboard
2013-03-10 14:43:44 [INFO] player1 and player2

/scoreboard players list player1
2013-03-10 14:44:23 [INFO] Showing 8 tracked objective(s) for player1
2013-03-10 14:44:23 [INFO] - Sacrifice: 0 (Sacrifice)
2013-03-10 14:44:23 [INFO] - Compassion: 0 (Compassion)
2013-03-10 14:44:23 [INFO] - Justice: 0 (Justice)
2013-03-10 14:44:23 [INFO] - Humility: 0 (Humility)
2013-03-10 14:44:23 [INFO] - Valor: 0 (Valor)
2013-03-10 14:44:23 [INFO] - Spirituality: 0 (Spirituality)
2013-03-10 14:44:23 [INFO] - Honesty: 0 (Honesty)
2013-03-10 14:44:23 [INFO] - Honor: 0 (Honor)



Example of suggested fix to add a colon at the end of the first line:

/scoreboard players list
2013-03-10 14:43:44 [INFO] Showing 2 tracked players on the scoreboard:
2013-03-10 14:43:44 [INFO] player1 and player2

/scoreboard players list player1
2013-03-10 14:44:23 [INFO] Showing 8 tracked objective(s) for player1:
2013-03-10 14:44:23 [INFO] - Sacrifice: 0 (Sacrifice)
2013-03-10 14:44:23 [INFO] - Compassion: 0 (Compassion)
2013-03-10 14:44:23 [INFO] - Justice: 0 (Justice)
2013-03-10 14:44:23 [INFO] - Humility: 0 (Humility)
2013-03-10 14:44:23 [INFO] - Valor: 0 (Valor)
2013-03-10 14:44:23 [INFO] - Spirituality: 0 (Spirituality)
2013-03-10 14:44:23 [INFO] - Honesty: 0 (Honesty)
2013-03-10 14:44:23 [INFO] - Honor: 0 (Honor)