Can't clone ctrlp repo '.' not being escaped

Explain the problem here ...
https://github.com/ctrlpvim/ctrlp.vim

`relevantinit.vim contents`
```
...
Plug 'ctrlpvim/ctrlp.vim'
...
```

```
x ctrlp:
Cloning into 'C:\Users\XXXXXXX\.nvim\bundle\ctrlp'...
remote: Invalid username or password.
fatal: Authentication failed for 'https://git::@github.com/ctrlpvim/ctrlp.git/'
```
See it should be getting `ctrlpvim/ctrlp.vim.git/` but it's only getting `ctrlpvim/ctrlp.git/`
------------------------------

```
Git version:
git version 2.18.0.windows.1

Neovim doesn't let me copy version, so see screenshot below
```

- Type:
- [X] Bug
- [ ] Enhancement
- [ ] Feature Request
- [ ] Question
- OS:
- [ ] All/Other
- [ ] Linux
- [ ] OS X
- [X] Windows
- Vim:
- [ ] Terminal Vim
- [ ] GVim
- [X] Neovim