- "block" (the default mode) displays per-block percentages in front of
each annotated line.
- "global" displays a global percentage in front of each line.
- "raw" displays the raw count of sample hits in front of each line.
Reviewed by: Pau Amma <pauamma@gundo.com>, mav
Sponsored by: University of Cambridge, Google, Inc.
Differential Revision: https://reviews.freebsd.org/D35401
Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.
Reviewed by: ru
Approved by: philip, ed (mentors)