Fixed two code examples which didn't compile

Author: Jan-Olof Hendig

doc/Language/ipc.pod6

@@ -46,7 +46,7 @@ the C<:out> and C<:err> flags. You may also pass input via the C<:in> flag.
 You may also use C<Proc> to capture the PID, send signals to the application,
 and check the exitcode.
 
-    my $crontab = run 'crontab' '-l';
+    my $crontab = run 'crontab', '-l';
     if $crontab.exitcode == 0 {
         say 'crontab -l ran ok';
     }
@@ -64,10 +64,10 @@ ability to send signals to that program.
     # Get ready to run the program
     my $log = Proc::Async.new('tail', '-f',  '/var/log/system.log');
     $log.stdout.tap(-> $buf { print $buf });
-    $log.stderr.tap(-> $buf { $*ERR.print $buf });
+    $log.stderr.tap(-> $buf { $*ERR.print($buf) });
 
     # Start the program
-    my $done = $proc.start;
+    my $done = $log.start;
     sleep 10;
 
     # Tell the program to stop