Do another pass on quoting and linting for the AE engine, the PS engine and the adobe FW: - Make sure we don't have any single quotes for strings. - Make sure that the code passes the linting rules defined by [our flake8 config](https://github.com/shotgunsoftware/tk-core/blob/master/.flake8)
Do another pass on quoting and linting for the AE engine, the PS engine and the adobe FW: