Problem:
The parent commit added a new vim.get_visual_selection() function to
improve visual star. But that is redundant with vim.region(). Any
current limitations of vim.region() should be fixed instead of adding
a new function.
Solution:
Delete vim.get_visual_selection().
Use vim.region() to get the visual selection.
TODO: fails with visual "block" selections.
f39ca5df23
