ng new --skip-git is ignored

[rol-dave-overall]

Bug Report or Feature Request (mark with an x)

- [X ] bug report -> please search issues before submitting
- [ ] feature request

Versions.

@angular/cli: 1.4.1
node: 6.11.2
os: win32 x64

Repro steps.

Execute ng new --directory . --skip-git in a folder which already contains a .gitignore file reports the error. Alternatively execute ng new --skip-git and upon looking in the folder a .gitignore file is still created.

The log given by the failure.

error! .gitignore already exists.

Desired functionality.

The ng new command should comply with the --skip-git option and not attempt to create a .gitignore file.

This was not an issue is version 1.3.2 and therefore must be a regression bug

[ADTC]

This was deliberate? 😱 Please see #8638 because I think there is a good use case for creating .gitignore file when it doesn't exist.

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