remove tilde from EndOfBuffer in transparent mode (#885)

the tildes are not transparent and are shown for example in nvimtree.
you cant make them transparent, but we can remove them.
no trailing whitespaces are generated.

lua/settings.lua

@@ -17,6 +17,7 @@ end
 if O.transparent_window then
   cmd "au ColorScheme * hi Normal ctermbg=none guibg=none"
   cmd "au ColorScheme * hi SignColumn ctermbg=none guibg=none"
+  cmd "let &fcs='eob: '"
 end
 
 ---  SETTINGS  ---