Clarify division truncates toward zero. Fixes #2856.

listings/ch03-common-programming-concepts/no-listing-07-numeric-operations/src/main.rs

@@ -10,7 +10,7 @@ fn main() {
 
     // division
     let quotient = 56.7 / 32.2;
-    let floored = 2 / 3; // Results in 0
+    let truncated = -5 / 3; // Results in -1
 
     // remainder
     let remainder = 43 % 5;

src/ch03-02-data-types.md

@@ -147,9 +147,9 @@ Floating-point numbers are represented according to the IEEE-754 standard. The
 
 #### Numeric Operations
 
-Rust supports the basic mathematical operations you’d expect for all of the
-number types: addition, subtraction, multiplication, division, and remainder.
-Integer division rounds down to the nearest integer. The following code shows
+Rust supports the basic mathematical operations you’d expect for all the number
+types: addition, subtraction, multiplication, division, and remainder. Integer
+division truncates toward zero to the nearest integer. The following code shows
 how you’d use each numeric operation in a `let` statement:
 
 <span class="filename">Filename: src/main.rs</span>