Bram, I did as requested. Executing command :verbose set diffopt? diffexpr? right after :vert diffsp b.txt and output is:
diffopt=internal,filler diffexpr= -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
