elasticsearch/elasticsearch — pull request #3613 by nik9000 (2013-09-03 18:31:18+00:00)
Title: Highlighting can return excerpt with no highlights

You can configure the highlighting api to return an excerpt of a field
even if there wasn't a highlight on the field. This must be implemented
in each highlighter individually.

The FVH implementation seems to do a good job of building the excerpt.
The Plain implementation I'm less happy with.

Closes #1171