This is an octal number. We used the 0 prefix in some places inconsistently. The kernel always interprets in base-8, so this has no effect, but I think it's nicer to use the 0 to remind the reader that this is not a decimal number.
This is an octal number. We used the 0 prefix in some places inconsistently. The kernel always interprets in base-8, so this has no effect, but I think it's nicer to use the 0 to remind the reader that this is not a decimal number.