Holoviews: Update installation docs for windows users

[jlstevens]

In the installation guide we have:

One user on windows has reported that pip install 'holoviews[all]' does not work while pip install holoviews[all] does. I don't really want to think about shell quoting across operating systems but won't the latter work for all systems? In what situation are the quoted versions necessary?

@jbednar @ceball Any thoughts on this?

[jbednar]

Brackets are used by some UNIX shells (e.g. tcsh) for their own purposes, leading to confusing and obscure errors:

tcsh> pip install holoviews[all]
pip: No match.

I was actually surprised to see that they are not used by bash, which is by far more popular than tcsh, so if the quotes cause problems on Windows, I guess the right thing to do is to take them out of the suggested commands, and then mention that they may need quoting on some systems.

[ceball]

Quoting should be fine on windows but it'd be " not ' (in the regular cmd.exe; in powershell it's probably more like what you're used to).

[jlstevens]

So is the recommendation to update the docs to use double quotes? @jbednar Is that also ok for tsch?

Edit: @jakirkham I may have accidentally pinged you when I meant to ping @jbednar . Oops!

[jakirkham]

No worries. :)

[jbednar]

Sounds like double quotes will consistently work across all platforms I know about (bash, tcsh, windows), so I guess the simplest thing is for us to use those and not mention anything about quoting.

[jlstevens]

This will be addressed once the PR referenced above is merged.