MFC r310648:

style(9): clean up trailing whitespace

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

This commit was generated by cvs2svn to compensate for changes in r156066,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r150974,
which included commits to RCS files with non-trunk default branches.

These files are not needed and were imported by accident in the
previous import.

This commit was generated by cvs2svn to compensate for changes in r150920,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r146525,
which included commits to RCS files with non-trunk default branches.

This commit was generated by cvs2svn to compensate for changes in r145557,
which included commits to RCS files with non-trunk default branches.