adambard/learnxinyminutes-docs — pull request #547 by rostdotio (2014-02-28 09:43:36+00:00)
Title: Added explanation for colon character

I am just starting out to learn Scala using this tutorial and was puzzled by definition of add10. What was the role of the `:` character? While I was able to figure it out, I suggest to explain explicit type declaration of values at this point in the tutorial by example of add10.