sfdisk does not handle whitespace the way the man page says

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Forwarding from deb bug #406817:

The sfdisk man page says:

Fields are separated by whitespace, or comma or semicolon possibly followed by whitespace; initial and trailing whitespace is ignored.

Looking at the code, it looks like it attempts to do this, but it fails somehow. It complains about trailing junk after number when I give it:

" 2048,2048,80"

Further, it hard codes a single space or hard tab as a field separator rather than using isspace() and does not make allowance for treating multiple spaces as a single separator, nor ignoring white space after a comma or semicolon.

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