getOption(pager) is set to the default value, checks whether
Sys.getenv("PAGER") appears to be
less by trying to run the
pager with the “version” and parsing the output. If
getOption(pager) is not the default value, then checks whether it
points to the
less program by the same mechanism.
Some systems may have
less pagers installed that do not respond to the
$LESS environment variable. For example,
more on at least some
versions of OS X is
less, but does not actually respond to
$LESS. If such as pager is the system pager you will likely end up
seeing gibberish in the pager. If this is your use case you will need to
set-up a custom pager configuration object that sets the correct system
TRUE or FALSE
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