Generate Context fails when a default list value provided

[simonwardjones]

Hi, I have never contributed to cookiecutter (or any open source to be honest) but gotta say i love cookiecutter.

Currently when including a list in a default context the generate context fails. For example if you had a default context as below with a list value for the "_copy_without_render" key.

{
    "1": 2,
    "some_key": "some_val",
    "_copy_without_render": [
        "**/*.txt"
    ]
}

In particular in the cruft project there is currently an issue caused by this: cruft/cruft#166

This PR updates the apply_overwrites_to_context and updates the tests such that when overwriting, if a list is given this overwrites the whole list.

[jensens]

remark: this PR fixes issue #1757

[A160989]

any update on getting this merged in?

[adamcunnington-mlg]

+1 still blocked by this

[luisdavim]

Any chances of getting this merged any time soon?

[simonwardjones]

Any chances of getting this merged any time soon?

[nialloriordanroo]

I'm also blocked by this

[s-agawane]

+1 still blocked by this.

[yuvaldolev]

Hi @simonwardjones

We started working on a new community fork of the Cookiecutter project, named Cookieninja.
The fork is found at: https://github.com/cookieninja-generator/cookieninja

We have re-opened and merged your PR in the Cookieninja project at: cookieninja-generator/cookieninja#34

We're trying to bring the life back to this amazing project.
We are committed to reviewing and merging each PR in up to 2 weeks from the day it's opened (if there are no issues with it).
We'd really like you to join the fork, star it and contribute to it!

Thank you :)