Integrate proofreading for chapter 3

Author: marijnh

03_functions.txt

@@ -461,7 +461,7 @@ What happens to local variables when the function call that created
 them is no longer active?
 
 The following code shows an example of this. It defines a function,
-`wrapValue` that creates a local variable. It then returns a function
+`wrapValue`, which creates a local variable. It then returns a function
 that accesses and returns this local variable.
 
 [source,javascript]
@@ -682,7 +682,7 @@ The indentation suggests the depth of the call stack. The first time
 `find` is called it calls itself twice to explore the solutions that start with
 `(1 + 5)` and `(1 * 3)`. The first call tries to find a solution that
 starts with `(1 + 5)` and, using recursion, explores _every_ solution
-that yields a number smaller than or equal to the target number. Since
+that yields a number less than or equal to the target number. Since
 it doesn't find a solution that hits the target, it returns `null`
 back to the first call. There the `||` operator causes the call that
 explores `(1 * 3)` to happen. This search has more luck because its
@@ -881,7 +881,7 @@ function, re-created every time the function is called, and not visible
 from the outside. Functions declared inside another function have
 access to the outer function's local scope.
 
-Separating the different tasks your program performs into different
+Separating the tasks your program performs into different
 functions is helpful. You won't have to repeat yourself as much, and
 functions can make a program more readable by grouping code into
 conceptual chunks, in the same way that chapters and sections help
@@ -936,7 +936,7 @@ or odd:
 
 - One is odd.
 
-- For any other number N, its evenness is the same as N - 2.
+- For any other number _N_, its evenness is the same as _N_ - 2.
 
 Define a recursive function `isEven` corresponding to this
 description. The function should accept a `number` parameter and
@@ -999,7 +999,7 @@ are in the string.
 
 Next, write a function called `countChar` that behaves like `countBs`,
 except it takes a second argument that indicates the character that is
-to be counted (rather than counting only uppercase "B" characters).
+to be counted (rather than counting only uppercase “B” characters).
 Rewrite `countBs` to make use of this new function.
 
 ifdef::interactive_target[]