* Fix sed error on Mac OS, also ignore entire commented lines.
* With proper quoting, the non-POSIX \d96 escape isn't necessary, and the check should work also on Mac OS.
Pull request #26 by trajano (e24777fa2c) changed `...` to $(...), but the following commit 7900ad7e1b already added another old-style one. I think the tests can also be used for some simple enforcement of coding style, so here is a first shot at it.
Closes#46