fixed usage of the html_attr escaping strategy to avoid double-escaping with the html strategy
bug #1211 fixed usage of the html_attr escaping strategy to avoid double-escaping with the html strategy (fabpot)

This PR was merged into the master branch.

Discussion
----------

fixed usage of the html_attr escaping strategy to avoid double-escaping with the html strategy

fixes #896

Commits
-------

f27d4a1 fixed usage of the html_attr escaping strategy to avoid double-escaping with the html strategy