Fix parsing of def using flags

[kit494way]

Fix #49

[fdncred]

I see these tested

def --env foo [] {}
def --env --wrapped bar [...args] {}

but does it cover these?

def --wrapped --env foo [] {}
def --wrapped bar [...args] {}

[stevenxxiu]

I also wonder if def-env should be changed to def --env?

[fdncred]

@stevenxxiu I don't follow. Where is def-env used in this PR?

[stevenxxiu]

@fdncred There are some in the tests and some in grammar.js, but this is now removed.

My changes based on @kit494way, at 750dab7 if you're interested.

[fdncred]

if we still have def-env anywhere, it needs to be removed, but not necessarily in this PR.

[stevenxxiu]

That could make sense, but would it be better to directly change the def-env tests to def --env, and remove def-env at the same time? After all, I thought the purpose of def flags is to replace def-env.

[kit494way]

@fdncred @stevenxxiu Thanks for your reviews. I will remove def-env and fix the tests in this PR.

[kit494way]

I removed def-env and fixed the tests.

[fdncred]

Thanks. looks good!