commit https://github.com/vim/vim/commit/70e136e1d86ea1d795774824c7b712245912946d Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 1 14:04:51 2016 +0200 patch 7.4.1970 Problem: Using ":insert" in an empty buffer sets the jump mark. (Ingo Karkat) Solution: Don't adjust marks when replacing the empty line in an empty buffer. (closes #892)

Results of test68:


{
a
b
}


{
a  
b  

a  
b
}


{
a



a


}


{
a b
#a b

a b
#a b
}


{
  1 a
    b
# 1 a
#   b
}


{

  x a
    b_
    c

}


{
# 1 a
#   b
}


{
# x a
#   b
}


{ 1aa ^^2bb }


/* abc def ghi jkl 
 *    mno pqr stu 
 *    vwx yz
 */


# 1 xxxxx
#   foobar