Clarity for 062 and tupni for 064

exercises/062_loop_expressions.zig

@@ -24,6 +24,10 @@
 // is probably not what you want. So consider the else clause
 // essential when using loops as expressions.
 //
+//     const four: u8 = while (true) {
+//         break 4;
+//     };               // <-- ERROR! Implicit 'else void' here!
+//
 // With that in mind, see if you can fix the problem with this
 // program.
 //

exercises/064_builtins.zig

@@ -70,5 +70,5 @@ pub fn main() void {
     // this builtin to reverse the bits of a u8 integer.
     const input: u8 = 0b11110000;
     const tupni: u8 = @bitReverse(input);
-    print("{b:0>8} backwards is {b:0>8}.\n", .{input});
+    print("{b:0>8} backwards is {b:0>8}.\n", .{input, tupni});
 }