Alon
Alon
It seems that Tkinter's grid_configure() chokes on a negative pad value when calculating the distance between the left and right button sets in the conc pane. [Traceback here](https://github.com/interrogator/corpkit/files/415073/corpkit_gui_20160812.txt)
Pad value has changed (it's now -703), but the same TclError occurs.
Confirmed working.
I take that back. Python3 crashes on the same line when do_concordancing=True.