* Add support for BusyBox less as pager
* Run tests/syntax-tests/update.sh to update tests
* Address reviewer's concerns with pull request
* Revert all changes in `test` directory
* Minimize overall diff size
* Detect busybox from separate helper function
* Pass equivalent options to BusyBox from same code by changing from long to
short options
* Remove redundant `if` statement from previous commit
Add test for invalid utf-8
Add `parse_less_version_busybox` to test for invalid program
Add commenting around short options
This fixes a bug on Windows where `Command::new` would also run
executables from the current working directory, possibly resulting in
accidental runs of programs called `less`.
Less 581.2 is here, and it has a ".2" in the version string, which can't
be parsed as a usize.
Update the check to find a non-digit character rather than a space. This
ignores the minor version, but parses the major version correctly.
