Lack of documentation on templates usage with CLI tool.

[Templates explanation](http://joel-costigliola.github.io/assertj/assertj-assertions-generator.html#generated-assertions-templates)
[CLI usage guide](http://joel-costigliola.github.io/assertj/assertj-assertions-generator.html#quickstart)
`You can change what is generated by modifying the templates used for assertions creation (have a look at templates directory)`

It's not clear at all what should I be looking at there. I see templates, but documentation gives no idea on how to change the type of assertions I want to generate. Documentation explains which template does what, and also what all these variables within templates stand for. But how do I "feed" a needed template to a CLI?
E.g., by default, classes with custom *straight* assertions are generated. How do I get *soft* assertions instead? Or some of these templates is (are?) used by CLI by default, and I need to modify it?