Reddit submissions and comments are styled with Markdown. If you have a
Markdown-aware pager/viewer on your system it is convenient to be able to
use it rather than the default 'less'/'more'/etc. one used for everything
else on the system. Support a high-priority environment variable that
will be consulted prior to checking $PAGER and/or defaulting to 'less'.
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
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