Revert "Api_blueprint: removed unicode symbols until drafter.js release"
Revert "Api_blueprint: removed unicode symbols until drafter.js release"

This reverts commit 49bb4cbc1059c673b7cc785d2d6ee88fa25b1ff0.

lucybot/api-spec-converter,lucybot/api-spec-converter,LucyBot-Inc/api-spec-converter,LucyBot-Inc/api-spec-converter,lucybot/api-spec-converter,LucyBot-Inc/api-spec-converter