This reverts commit be03ab9e.

This reverts commit 0b38fada.

- apply the PyCharm "optimize imports"
- place functions above fixtures
- alphabetize fixture functions
- remove duplicate tmp_dir fixture

This change fixes the installation of packages using a url source.
Previously, the installer attempted to install the package using the
name ignoring the source url.

* fix METADATA generation for git dependencies with extras

* add comment

* add comment

* add comment and linting

* Move trailing space from `base_pep_508_name()` to `to_pep_508()`

* Merge remote-tracking branch 'origin/master'

# Conflicts:
#	tests/packages/test_vcs_dependency.py

* Make changes python2 compliant

* Handle any type of marker

* Insert space before semicolon in dependency.py if vcs

* Setup basic Github actions

* Remove Travis and Appveyor config files

* Update pre-commit configuration

remove --> uninstall

doc: fix some typos

- Add missing ".py" for file structure
- Fix slash for Windows path
- Fix word case to match other titles

Catch and deal with failed symlinking on Windows

Check to ensure the global config exists before reading

remove NoReturn, use None instead

950 simplified

Building upon patch from [#1299][1]

[1]: https://github.com/sdispater/poetry/pull/1299/commits

Co-authored-by: David Hotham <david.hotham@metaswitch.com>

Fixes cases where the version part of the wheel file name would become

`0.1b1_gitbranch.buildno.1`

instead of

`0.1b1+gitbranch.buildno.1`

Fixes sdispater/poetry#756

fix typo in doc site

Add bool typing for VCSDependency.accepts_prereleases