CSV mode needs quotes

[simsong]

Converted from SourceForge issue 2800016, submitted by jessekornblum

The -c mode, for comma separated values, is not a true CSV mode. Because filenames can contain commas, the filenames must be enclosed in quotation marks. Like this:

d41d8cd98f00b204e9800998ecf8427e,"emptyfile.txt"

Remember that

d41d8cd98f00b204e9800998ecf8427e,"foo,bar"

would be valid!