MFC: r310712

- Use correct offsets into the keys set array. As the elements of this
zero-length array are dynamically sized at run-time based on the use
of hints, compilers can't be expected to figure out these offsets on
their own. [1]
- Fix incorrect comparison in cmp_nans(). [2]

PR: 204571 [1], 202301 [2]
Submitted by: David Binderman [2]

MFC r264581, r264744:

Various style(9) fixes and typos in printf, grep, sort and patch.

#define should be followed by a tab.

MFC r264581, r264744:

Various style(9) fixes and typos in printf, grep, sort and patch.

#define should be followed by a tab.