New feature: skip field with the same name as the current field. See My Blog and TipForSkipFieldWithSameName.

proper undo support for snippet. See My Blog.

make smart-snippet.el a fork of snippet.el, that is, I copy and paste the original code of snippet.el into smart-snippet.el and do the necessary modification there. An enhancement is added to let the user use "\\" to escape some characters that might other be recognized as snippet identifiers. See My Blog and TipForEscape.

overwrite the previously defined snippet with the same abbrev-name and template. In real world, snippet with identical abbrev-name and template but different conditions are seldom. In fact, they can be combined by combining their conditions with or. And this behavior(overwriting) can be helpful when debugging. Thanks for happierbee@newsmth for the idea.

add support for defining duplicated snippet for multiple abbrev-table in a convenient way. See ConfigExample for more details.