std_misc/process/pipe: Update comments to match current API.

[sourcefrog]

No description provided.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @steveklabnik (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. The way Github handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[steveklabnik]

Two small nits: stdin should be in backticks, and there should be an extra // between your first and second line.

[steveklabnik]

This looks great, just a few small nits

[sourcefrog]

Thanks, please take another look.

[steveklabnik]

@bors: r+

[steveklabnik]

@bors: rollup

[steveklabnik]

Thank you! :)

[steveklabnik]

Hehe whoops, forgot we don't use Bors here! Thanks again.