The description of copyToArray should say "Copies at most len elements of
xs to arr," instead of "copies at most len elements of arr." It should
also specify whether the start index is for the array or for the
collection being copied from.

Table that summarizes operations of Iterable trait:

xs.zipWithIndex - An iterable of pairs of elements from xs with
their indicies (should've spelled "indices")

Since the expression is written as "xs(i) = x" the following sentence
"Changes the element of xs at index i to y." should be "Changes the
element of xs at index i to x.".

Missing preposition "in" in the first sentence of the "Sorted sets"
chapter:

A SortedSet is a set where, no matter what order elements 
                                      ^
were added to the set, the elements are traversed in sorted order.

The first sentence on the page contains one extra word "have":

... but it would have have taken more code to do so.
                      ^

"Because if this" -> "Because of this"

[Fixed.]

It's - > its

In the explanation of putIfAbsent function, key/value binding should be
"k -> v" not "k -> m".

In the last paragraph of Equality subsection, the array name should be
buf, not xs:
...because the hash code of the array *xs* has changed... -> ...because
the hash code of the array "buf" has changed...
...than the one in which *xs* was stored. -> ...than the one in which
"buf" was stored.

In the listing that shows view operations one by one, it is listed:

val vv = v.view
vv: scala.collection.SeqView[Int,Vector[Int]] =
SeqView(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

But, in the interpreter, the same expression gives lazy result:

val vv = v.view
vv: scala.collection.SeqView[Int,Vector[Int]] = 
SeqView(...)

"..and do not have a ClassManifest to provide it at run-time."

The 'it' seems too much, and I cannot figure out where it would point.

-> "..a ClassManifest to provide at run-time."

[Agreed. I changed "it" to "the element type". (Also we changed
ClassManifest to ClassTag.)]

"Scala arrays offer much more (than) their Java analogues." 

"than" is missing.

[Fixed.]

The 'start' arguments to Iterator's addString and mkString are typeset in
the books regular serifed font and should instead be monospaced.

Third paragraph, 6th line: "...or whether it is *an* trait such as..."

"You've now seen how to use Scala's collection in great detail.":
"collection" -> "collections" or "collection" -> "collection library"

For "it take n":

"An iterator returning of the first n..."
->
"An iterator returning the first n..."

[Fixed.]

Add Vector to the index.

[Done]