Readme is unclear regarding the meaning of the lines "Data", "none", etcetera. about compsize HOT 4 CLOSED

The man page has a more detailed explanation, but you're right, as README mentions all other fields, it should say what's "Type" as well.

I added a line, is this enough?

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Even after reading https://github.com/kilobyte/compsize/blob/master/compsize.8 it is still not clear to me what "Data" and "none" are.

It feels like "none" means "not compressed". Then 100% is redundant for that line.
Also redundant is the column header "Perc" and value "..%" -> "C.ratio" (value=1-current printed %)), and "Type" means "Compression type".

Still no clue what "compression type = Data" means.

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It feels like "none" means "not compressed". Then 100% is redundant for that line.

Yeah, 100% is redundant, but a table looks better with this. A different placeholder such as -- or N/A wouldn't probably be an improvement.

Still no clue what "compression type = Data" means.

What about "TOTAL", in all caps, to mark it apart from rows it's a sum of?

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When "Data" is a total, it at least be at the bottom, below the lines it sums.
Preferably marked by a dashed line:

Type       Ratio     Disk Usage   Uncompressed Referenced
none          0%     1.4G         1.4G         1.7G
zstd         57%     574K         1.2M         1.2M
---------  -----  -------      -------      -------
total         1%     1.4G         1.4G         1.7G

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