[docs] [issue13402] Document absoluteness of sys.executable

Brad Larsen added the comment: It looks like sys.executable is *not* always an absolute path. In Python 2.7: $ which python2.7 /opt/local/bin/python2.7 $ cd /opt/local/bin $ ../bin/python2.7 -m 'import sys; print(sys.executable)' /opt/local/bin/../bin/python2.7 Also in Python 3.5: $ which python3.5 /opt/local/bin/python3.5 $ cd /opt/local/bin $ ../bin/python3.5 -m 'import sys; print(sys.executable)' /opt/local/bin/../bin/python3.5 ---------- nosy: +blarsen _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue13402> _______________________________________