Blogger “read more” without the bug

This hack was written before the introduction of Blogger jump-break (read more) feature. Blogger jump-break doesn’t have this bug. As you may notice many blogs use “read more” (a.k.a. expandable post) thingy on their homepages. For readers who are unfamiliar with this feature, what a read more function does is when you are at the homepage (or any index page), only post snippets are displayed,