bug: clojurers script runner shows EOF error after successful script run

[erkkikeranen]

even if script succeeds, it returns an error condition

$ cargo run -- examples/hello_world.clj
Hello, world
#Condition["Tried to read empty stream; unexpected EOF"]

expected success case:

no more output after Hello, world

[phrohdoh]

The read function will need to return Result/Option of Value (or a similar solution). Currently it returns this error-indicating Condition when there are no more lines to read (which is certainly not what the user expects).

Edit: #62 (comment) indicates returning Value itself is desired, with the solution to this being ignoring a particular Condition ret val. 🤔