|Subject:||bug#26422: historical feature or grand daddy bug?|
|Date:||Sun, 9 Apr 2017 12:04:34 -0700|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0|
So, it's not a bug that \t\n collates after \n, since "\t" is lexicographically after "".
As I understand it, the empty string should collate before all other strings in all POSIX locales, so empty lines should always sort first in 'sort' output. I'm by no means a collation expert, though, and if I'm wrong I'd like to see a counterexample.
Come to think of it, 'sort' might be able to improve performance in the common case of sorting text files containing many empty lines, by merely counting the lines rather than storing them internally. I suppose this is a different topic, though.
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