Config variables not escaped with latest heroku-api gem

[fabn]

After a bundle update I got heroku-api updated to v0.3.17. After that update I wasn't able to deploy to heroku anymore because some of my heroku vars contains spaces and other special chars.

I don't know this gem enough to diagnose if the issue is related to this gem or to heroku-api. I'll try to understand this, in any case if the issue is not in this gem you should lock the heroku-api gem to version 0.3.15 until the issue is solved, something like

s.add_runtime_dependency "heroku-api", ">= 0.1.2", , "!= 0.3.16", "!= 0.3.17"

By the way I solved the issue by locking heroku-api to version 0.3.15, here are the changes between the two versions. They changed their implementation to multijson, maybe request body is not escaped correctly.