discourse/discourse — pull request #2836 by Elberet (2014-10-01 22:46:14+00:00)
Title: FIX: quoting non-existing messages would break SMF2 importer

Fixes issues with the SMF2 importer:
- error when non-existent message is quoted,
- possibly invalid quotation markdown,
- error in I18n when generating markdown for uploads.