The truncate text helper currently cuts off the given text mid-word if that's where the length limit is reached.

This backwards-compatible patch allows you to pass the :separator option to make the truncated result end at the last occurrence of the given separator (within the length allowed).

If you don't pass the :separator option the helper behaves as it currently does. This means that all existing code will continue to work the same way.

Typically you would use this to have the truncated text finish at the end of a word.

For example:

truncate("Once upon a time in a world far far away")

=> Once upon a time in a world f...

truncate("Once upon a time in a world far far away", :separator => ' ')

=> Once upon a time in a world...