it's slightly confusing, because in the change the first dash on the first line is a "minus", indicating that line was removed, not part of the line of dashes. the line of dashes had one dash added to the end of it. (and it was a dash missing, not an equal)

       1.9 Ext4 file system parameters
    [-]------------------------------
    [+]-------------------------------

There is a - missing under the s of parameters.