patch 8.1.0502: internal diff fails when diffing a context diff commit https://github.com/vim/vim/commit/f080d70a82f3a4477f346d9efcdfaec1bc1e1d58 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Oct 31 22:57:26 2018 +0100 patch 8.1.0502: internal diff fails when diffing a context diff Problem: Internal diff fails when diffing a context diff. (Hirohito Higashi) Solution: Only use callback calls with one line. (closes https://github.com/vim/vim/issues/3581)

|f+0&#ffffff0|o@1| |4| @64
|f|o@1| |5| @64
|f|o@1| |6| @64
|f|o@1| |7| @64
|f|o@1| |8| @64
|f+8&&|o@1| |9| @64
|f+0&&|o@1| |1|0| @63
|b|a|r| |1@1| @63
|:|9|,|1|0|s|/|b|a|r> @59