Fixed some formatting issues

Author: Jan-Olof Hendig

doc/Type/Supply.pod6

@@ -241,15 +241,15 @@ on to the C<Supply>. (for example, C<$supply.on-close(&on-close).map(*.uc)>).
 When using a C<react> or C<supply> block, using the L<CLOSE|/language/phasers#CLOSE>
 phaser is usually a better choice.
 
-my $s = Supplier.new;
-my $tap = $s.Supply.on-close({ say "Tap closed" }).tap(
-    -> $v { say "the value is $v" },
-    done    => { say "Supply is done" },
-    quit    => -> $ex { say "Supply finished with error $ex" },
-);
+    my $s = Supplier.new;
+    my $tap = $s.Supply.on-close({ say "Tap closed" }).tap(
+        -> $v { say "the value is $v" },
+        done    => { say "Supply is done" },
+        quit    => -> $ex { say "Supply finished with error $ex" },
+    );
 
-$s.emit('Perl 6');
-$tap.close;        # OUTPUT: «Tap closed␤»
+    $s.emit('Perl 6');
+    $tap.close;        # OUTPUT: «Tap closed␤»
 
 =head2 method interval
 
@@ -586,9 +586,9 @@ Use C<migrate> to join the values into a single supply again.
 
     method migrate(Supply:D: --> Supply:D)
 
-Takes a Supply which itself has values that are of type Supply as input. Each
-time the outer Supply emits a new Supply, this will be tapped and its values
-emitted. Any previously tapped Supply will be closed. This is useful for migrating
+Takes a C<Supply> which itself has values that are of type C<Supply> as input. Each
+time the outer C<Supply> emits a new C<Supply>, this will be tapped and its values
+emitted. Any previously tapped C<Supply> will be closed. This is useful for migrating
 between different data sources, and only paying attention to the latest one.
 
 For example, imagine an application where the user can switch between different