quote fixes initial commit

indoc/Chapter 1/Context Symbols.w

@@ -65,7 +65,7 @@ int Symbols::perform_ifdef(text_stream *cond) {
 }
 
 @ There is an expression grammar here, which we apply correctly if the
-condition is well-formed; if it"s a mess, we try to return 0, but don"t go
+condition is well-formed; if it's a mess, we try to return 0, but don't go
 to any trouble to report errors.
 
 Any condition can be bracketed; otherwise we have the unary operator |^|

indoc/Chapter 2/HTML and Javascript.w

@@ -39,7 +39,7 @@ Otherwise, of course, we need to make an images folder alongside the HTML
 we produce. It will be called |images|, so relative to the HTML, the URL
 would then be |images/orange.png|.
 
-However, it"s also possible that the book"s instructions tell us to use
+However, it's also possible that the book's instructions tell us to use
 images from an already-existing location instead.
 
 Note that each time the URL of an image is looked up, we make a note of it,

indoc/Chapter 2/Renderer.w

@@ -446,7 +446,7 @@ see below.
 	    {*}A ball is in the bag.
 	    The bag is on the kitchen table.
 	
-	This single sentence doesn"t make much of a simulation. Let"s add:
+	This single sentence doesn't make much of a simulation. Let's add:
 	
 	    {**}The stitched seam is part of the ball.
 =