update errata

README.md

@@ -156,7 +156,7 @@ They are respectively:
 
 ## Errata
 
-### Chapter 2, page 30
+### Chapter 2, section 2.3.1, page 30
 
 I compare the following expressions:
 
@@ -192,3 +192,8 @@ julia> show(if x > 0
        end)
 nothing
 ```
+
+### Chapter 3, section 3.2.3, pages 58-59
+
+* middle of page 58: `y[end - the + 1] = y[end -- k]` should be `y[end - i + 1] = y[end - k]`
+* top of page 59: `sort(v::AbstractVector; kwthe.)` should be `sort(v::AbstractVector; kws...)`