Update exercises/108_labeled_switch.zig

Fixed an error in the debug statement and made the text a bit more coherent.

Signed-off-by: chrboesch <chrboesch@noreply.codeberg.org>

exercises/108_labeled_switch.zig

@@ -15,11 +15,11 @@
 //                  1 => { op = 2; continue; },
 //                  2 => { op = 3; continue; },
 //                  3 => return,
-//                  4 => {},
+//                  else => {},
 //              }
 //              break;
 //          }
-//      std.debug.print("This statement cannot be reached");
+//      std.debug.print("This statement cannot be reached\n", .{});
 //      }
 //
 // By combining all we've learned so far, we can now proceed with a labeled switch
@@ -36,23 +36,21 @@
 //              3 => return,
 //              else => {},
 //          }
-//          std.debug.print("This statement cannot be reached");
+//          std.debug.print("This statement cannot be reached\n", .{});
 //      }
 //
 // The flow of execution on this second case is:
 //  1. The switch starts with value '1';
 //  2. The switch evaluates to case '1' which in turn uses the continue statement
-//        to re-evaluate the labeled switch again, now providing the value '2';
+//     to re-evaluate the labeled switch again, now providing the value '2';
 //  3. In the case '2' we repeat the same pattern as case '1'
-//        but instead the value to be evaluated is now '3';
-//  4. Finally we get to case '3', where we return from the function as a whole.
+//     but instead the value to be evaluated is now '3';
+//  4. Finally we get to case '3', where we return from the function as a whole,
+//     so the debug statement is never executed.
 //  5. In this example, since the input does not have clear, exhaustive patterns and
-//     can essentially be any `u8` integer, we need to handle all cases not explicitly
-//     covered by using the `else => {}` branch as the default case.
-
+//     can essentially be any 'u8' integer, we need to handle all cases not explicitly
+//     covered by using the 'else => {}' branch as the default case.
 //
-// Since step 4 or a break stament do not exist in this switch, the debug statement is
-// never executed
 //
 const std = @import("std");