added process.run example.

[vectorselector]

I am not sure if this is correct way to contribute to project. (forked then edited, then PR'ed)
Added process.run example at line 143.
I am not sure if only demonstrating output is ok or if you want input and error as part of it also
I am also unsure if you are still using IO::Memory.new.

[jhass]

Suggested change

[jhass]

Unfortunately this is not a good example, as this is better solved with Process.run(command) {|proc| pp proc.output.gets_to_end } or simply pp `#{command}`. Secondarily it demonstrates interpolating arguments without proper quoting over the preferred and safer way of just populating args. Finally I don't quite see the need for the command local variable.

[straight-shoota]

Maybe a good idea to make this better would be using cat with input and output streams. The example would write to input and read the same content from output.

[vectorselector]

ok thank you, i'll try again

[straight-shoota]

Thanks for this!

I am not sure if this is correct way to contribute to project. (forked then edited, then PR'ed)

That's exactly how this is supposed to work. You can find more information on this in CONTRIBUTING.md

I am not sure if only demonstrating output is ok or if you want input and error as part of it also

An error example wouldn't hurt, but it's also not necessary. Having a good example of working behaviour is most important.

I am also unsure if you are still using IO::Memory.new.

Yeah, that's correct.
You would often use String.build instead, which is more optimized for building strings from code. For this use case it doesn't make a difference, though, because the stream comes from a pipe.