Rewrote sequence comprehensions section of tour

[travissarles]

No description provided.

[Ichoran]

Although the style of indentation in parens varies widely, I'm not sure this one is a good one for a tutorial since we don't do trailing braces in Scala, generally, and trailing parens aren't that different from trailing braces. I'd format it as

val userBase = List(
  new User("Travis", 28),
  ...
  new User("Dennis", 23)
)

[Ichoran]

Again, I'm not sure this is the best style to promote as it invites confusion about the comprehension part and the yield part. You don't indent the else farther than the corresponding if, so I'd tend to

for (...)
yield (i, j)

or

for (
  ...
)
yield (i, j)

[travissarles]

I agree it looks nicer but all of the examples in Odersky's book use an indent as does IntelliJ.