* Remove some tests we no longer need
* Delete blocks of redundant code
* Compress some tests together to simplify them
* Remove a little code for ancient linter versions
* Escape more executables we didn't escape before
* Rename a deno option that didn't match our conventions
* Fixed (g)awk linter
* Made it secure, albeit less useful.
* Added gawk handler; the cpplint one was not working?
* Added gawk handler test.
* added warning to gawk handler.
* added gawk command callback test
* added comment about --source
* added back optional commandline option