Update docs to add git+ssh install example

[waketzheng]

1. Move line 21 to be line 23, so that it is easy to compare git+ssh with git+https
2. Add a real sample for install with git+ssh

[ichard26]

The change looks fine, but what's the point of this change? It's not like only git supports the SSH protocol.

[waketzheng]

The change looks fine, but what's the point of this change? It's not like only git supports the SSH protocol.

If there is an example, people who have similar requirement, can as simple as to copy it and change the package name to install, without reading any other details.

[waketzheng]

@webknjaz resolved.

[ichard26]

I'm going to make the executive decision and say that this is unnecessary. Users should be able to use the sample command and translate it to the appropriate full pip invocation for their system on their own.

Thank you for your interest in improving our documentation, but I'm going to close this.