code examples are made like this
[[[ Transcript show: 'hello";
���������������������������������������� show: ' world";
���������������������������������������� cr;]]]
There is also additional syntax if your language is not smalltalk and some other stuff. Take a look at pillar docs.
you can also have a workaround for multi line comments. Damien has created a pillar mode for emacs, and there is shortcut to comment multiple lines. So you could write your comment in multiple lines , select those lines and use the shortcut. The shortcut is the regular shortcut that emacs uses in all modes to comment things out for multiple lines.
I use this technique to disable part of the pillar code when I try to find bugs.