# file before.csv before processing.
x,                DAB         # just reorder
y,                aCBBB       # line with duplicate letters
y,                Z X         # line with spaces, dup col 0 of line before
z                             # all spaces
space.html,       E R  S AS  # multiple spaces
,,,                           # empty fields
# this is a line comment
bellweather.html, abcDEF      # case-sensitive reorder
abundance.html,   EDQA        # typically how I use this. The letters are processing options for exceptional files.
font.html,        AELLP
activedit.html                # no column 1
addnotify.html,   Z           # only one letter