Serhiy Storchaka added the comment:
Tkinter is just a wrapper around the Tk library. It returns what Tk returns.
See Tk documentation:
https://www.tcl.tk/man/tcl8.6/TkCmd/winfo.htm#M15
https://www.tcl.tk/man/tcl8.6/TkCmd/wm.htm#M42
If you want to improve Tkinter documentation, patches are wel
New submission from Peter J :
the root.geometry() top-level window method returns strings like
"212x128+-9+-8" when the window is located in the top left corner. The
documentation only describes geometry strings containing + or - location
coordinates. If this is correct behaviour, the document