[docs] [issue29688] Add support for Path.absolute()

Brett Cannon <brett@python.org> added the comment: I have opened https://bugs.python.org/issue39090 to track updating the pathlib docs to have a section on getting the absolute path in various ways along with what the trade-offs are for each approach. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue29688> _______________________________________