When typing anything longer than what minecraft will show, there will be a space when creating a new line. It would look like:

One command example is a command block for when i was setting up the anouncements. The command is:

/tellraw @p {"text": "", "extra": [{"text":"Heres how money works. You can buy items at the shop at spawn. If you die, you loose all your money. Don't die. You gain money by killing hostile mobs. Heres how much each is worth:","color":"green","clickEvent":{"action":"run_command","value":""}}]}

This will type the first line and all the others will have a space before the text. I have not seem this before untill 1.7 and it causes colored chat on some bukket servers to become normal chat when the text is on 2 lines.