sysutils/py-ranger: 1.7.1 -> 1.7.2

Changes:

• Fixed file name arguments passed to sxiv and feh when using :flat
• Fixed removal of empty directories when using :rename
• Fixed free disk space display on Mac OS X
• Fixed examples/vim_file_chooser to work with gvim too
• Fixed some other rare crashes and bugs
• Fixed downward mouse wheel scrolling
• Fixed warning about regex splits being drawin in title bar since python3.5
• Really fixed S key binding not working when SHELL=fish
• Improved doc/cheatsheet.svg
• Added some entries to rifle.conf
• Added key bindings pO and pP which work like po and pp but queue the operation in a first-in-first-out order.

PR: 208734
Submitted by: Daniel Lin <linpct@gmail.com> (maintainer)