Explore the limits of --bash flag in PaSh

[angelhof]

PaSh recently added support for bash syntax using the --bash flag. However, there are still bugs and limitations to this. It would be great if people could start running more (and more complex) bash scripts with PaSh to determine what it can and it can't do well. The ultimate goal would be to make the --bash flag the default, to support a wider variety of scripts, and to also build all of the future PaSh extensions using the --bash flag.

[nvasilakis]

To offer potential roadmap/options here:

• Run individual Smoosh or POSIX tests using --bash to see if they work as expected
• Run current evaluation infrastructure using --bash to see if works as expected
• Run individual tests from the Bash project