Typing goo at your shell will start up a GOO read-eval-print
loop, which accepts sexpressions and top-level commands commencing
with a comma. The following is a list of available commands:
,quit K exits from GOO.
C-c K invokes a recursive read-eval-print loop.
,g2c-eval K to change to dynamic compilation evaluation.
,ast-eval K to change to ast evaluation.
GOO_EVAL_MODE <str> I environment variable for setting goo's evaluation mode. Valid
settings are "ast" or "g2c".
,in ,name K changes to module ,name.
mod:name == L accesses an unexported binding from another module.