Normalized exercise output, answers (#41)

1. All exercises should print a trailing \n
2. The build script should always show you _exactly_ what it's looking
   for when you get it wrong. Therefore, .output should be set to the
   exact expected output.

build.zig

@@ -73,12 +73,12 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "007_strings2.zig",
-        .output = "Ziggy",
+        .output = "Ziggy played guitar\nJamming good with Andrew Kelley\nAnd the Spiders from Mars",
         .hint = "Please fix the lyrics!",
     },
     .{
         .main_file = "008_quiz.zig",
-        .output = "Program in Zig",
+        .output = "Program in Zig!",
         .hint = "See if you can fix the program!",
     },
     .{
@@ -87,16 +87,16 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "010_if2.zig",
-        .output = "price is $17",
+        .output = "With the discount, the price is $17.",
     },
     .{
         .main_file = "011_while.zig",
-        .output = "n=1024",
+        .output = "2 4 8 16 32 64 128 256 512 n=1024",
         .hint = "You probably want a 'less than' condition.",
     },
     .{
         .main_file = "012_while2.zig",
-        .output = "n=1024",
+        .output = "2 4 8 16 32 64 128 256 512 n=1024",
         .hint = "It might help to look back at the previous exercise.",
     },
     .{
@@ -117,12 +117,12 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "017_quiz2.zig",
-        .output = "8, Fizz, Buzz, 11, Fizz, 13, 14, FizzBuzz, 16",
+        .output = "1, 2, Fizz, 4, Buzz, Fizz, 7, 8, Fizz, Buzz, 11, Fizz, 13, 14, FizzBuzz, 16,",
         .hint = "This is a famous game!",
     },
     .{
         .main_file = "018_functions.zig",
-        .output = "Question: 42",
+        .output = "Answer to the Ultimate Question: 42",
         .hint = "Can you help write the function?",
     },
     .{
@@ -158,7 +158,7 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "026_hello2.zig",
-        .output = "Hello world",
+        .output = "Hello world!",
         .hint = "Try using a try!",
         .check_stdout = true,
     },
@@ -204,7 +204,7 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "036_enums2.zig",
-        .output = "#0000ff",
+        .output = "<p>\n  <span style=\"color: #ff0000\">Red</span>\n  <span style=\"color: #00ff00\">Green</span>\n  <span style=\"color: #0000ff\">Blue</span>\n</p>",
         .hint = "I'm feeling blue about this.",
     },
     .{
@@ -213,7 +213,7 @@ const exercises = [_]Exercise{
     },
     .{
         .main_file = "038_structs2.zig",
-        .output = "Character 2 - G:10 H:100 XP:20",
+        .output = "Character 1 - G:20 H:100 XP:10\nCharacter 2 - G:10 H:100 XP:20",
     },
     .{
         .main_file = "039_pointers.zig",

exercises/022_errors2.zig

@@ -25,5 +25,5 @@ pub fn main() void {
     // an error. Can you set the type correctly above?
     my_number = MyNumberError.TooSmall;
 
-    std.debug.print("I compiled!", .{});
+    std.debug.print("I compiled!\n", .{});
 }

exercises/023_errors3.zig

@@ -14,7 +14,7 @@ pub fn main() void {
     var a: u32 = addTwenty(44) catch 22;
     var b: u32 = addTwenty(4) ??? 22;
 
-    std.debug.print("a={}, b={}", .{ a, b });
+    std.debug.print("a={}, b={}\n", .{ a, b });
 }
 
 // Please provide the return type from this function.

exercises/024_errors4.zig

@@ -25,7 +25,7 @@ pub fn main() void {
     var b: u32 = makeJustRight(14) catch 0;
     var c: u32 = makeJustRight(4) catch 0;
 
-    std.debug.print("a={}, b={}, c={}", .{ a, b, c });
+    std.debug.print("a={}, b={}, c={}\n", .{ a, b, c });
 }
 
 // In this silly example we've split the responsibility of making

exercises/025_errors5.zig

@@ -19,7 +19,7 @@ pub fn main() void {
     var b: u32 = addFive(14) catch 0;
     var c: u32 = addFive(4) catch 0;
 
-    std.debug.print("a={}, b={}, c={}", .{ a, b, c });
+    std.debug.print("a={}, b={}, c={}\n", .{ a, b, c });
 }
 
 fn addFive(n: u32) MyNumberError!u32 {

exercises/036_enums2.zig

@@ -53,6 +53,7 @@ pub fn main() void {
         \\  <span style="color: #{x:0>6}">Green</span>
         \\  <span style="color: #{}">Blue</span>
         \\</p>
+        \\
     , .{
         @enumToInt(Color.red),
         @enumToInt(Color.green),

exercises/037_structs.zig

@@ -52,7 +52,7 @@ pub fn main() void {
     // Ouch! Glorp takes a punch!
     glorp_the_wise.health -= 10;
 
-    std.debug.print("Your wizard has {} health and {} gold.", .{
+    std.debug.print("Your wizard has {} health and {} gold.\n", .{
         glorp_the_wise.health,
         glorp_the_wise.gold,
     });

exercises/043_pointers5.zig

@@ -73,7 +73,7 @@ fn printCharacter(c: *Character) void {
         .warrior => "Warrior",
     };
 
-    std.debug.print("{s} (G:{} H:{} XP:{})", .{
+    std.debug.print("{s} (G:{} H:{} XP:{})\n", .{
         class_name,
         c.gold,
         c.health,