noosfero | Fixes HTML safe for long article leads (!1098)

[Gabriel Silva]

New Merge Request !1098

https://gitlab.com/noosfero/noosfero/merge_requests/1098

Project:Branches: gabrielssilva/noosfero:html_safe to noosfero/noosfero:master
Author:    Gabriel Silva
Assignee:  

Covers the problem pointed in #232

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