Don't trim remarkup corpora before summarizing
Summary:
Currently, lists like this:
- a - b - c
...get trimmed before summarization and end up looking like this after summarization:
- a - b - c
This produces the summary artifacts (first item at wrong indent level):
Instead, don't trim. This produces better summaries.
Test Plan: Saw a better summary of a list.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D12794