fix: Update 19.02 (#796)

Author: BenjaminMichaelis

Errata.md

@@ -41,4 +41,5 @@ Zhou Jing | 22 | 1065 - 1066 | Changed 'Thread' to 'Task' and "Application exiti
 Zhou Jing | 4 | 161 | Fix `input < 9` to `input < 0` in Listing 4.24
 Zhou Jing    | 4 | 119 | Show inconsistent size multi-dimensional array in listing 3.16
 Zhou Jing | 3  | 114 | Replace `second` with `third` in "// Retrieve third item from the end (Python)"
-Tyler Woody | 13 | 702 | Remove the `!` negation in `string.IsNullOrWhiteSpace(input)` in the while loop to properly allow looping
+Tyler Woody | 13 | 702 | Remove the `!` negation in `string.IsNullOrWhiteSpace(input)` in the while loop to properly allow looping
+Benjamin Michaelis | 19 | 948-949 | Add a `(` before the `next + 1` to complete the parenthesis.

src/Chapter19/Listing19.02.PollingATask.cs

@@ -1,9 +1,9 @@
-namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter19.Listing19_02;
+namespace AddisonWesley.Michaelis.EssentialCSharp.Chapter19.Listing19_02;
 
 #region INCLUDE
 using System;
 using System.Threading.Tasks;
-using AddisonWesley.Michaelis.EssentialCSharp.Shared;
+using AddisonWesley.Michaelis.EssentialCSharp.Shared; // EXCLUDE
 
 public class Program
 {
@@ -17,10 +17,10 @@ public static void Main()
         #endregion HIGHLIGHT
                 () => PiCalculator.Calculate(100));
 
-        foreach(
+        foreach (
             char busySymbol in Utility.BusySymbols())
         {
-            if(task.IsCompleted)
+            if (task.IsCompleted)
             {
                 Console.Write('\b');
                 break;
@@ -55,15 +55,15 @@ public static IEnumerable<char> BusySymbols()
     {
         string busySymbols = @"-\|/-\|/";
         int next = 0;
-        while(true)
+        while (true)
         {
             yield return busySymbols[next];
-            next = next + 1) % busySymbols.Length;
+            next = (next + 1) % busySymbols.Length;
             yield return '\b';
         }
     }
 }
- #region EXCLUDE
+#region EXCLUDE
 */
 #endregion EXCLUDE
 #endregion INCLUDE