consistently use 0x prefixes in RLP tests

[AlexKnauth]

This finishes what #557 started, to use 0x prefixes consistently in rlptest.json, invalidRLPTest.json, and RandomRLPTests/example.json.

This also updates the documentation in rlp_tests.rst to describe the 0x and # prefixes.

[winsvega]

have you checked that testeth is working with this change ?

[AlexKnauth]

I haven't gotten testeth working on my computer yet, so I don't know.

[holgerd77]

@AlexKnauth Testeth now has it's own up-to-date docker image, so it should be (in theory, please report if otherwise) relatively easy to test.

[AlexKnauth]

@holgerd77 Thank you. I've tried running the command

docker run \
    -v /Users/Alex/Documents/GitHub/ethereum/tests:/foobar \
    ethereum/testeth:nightly \
    -t RLPTests \
    -- --testpath /foobar

However, it seems like testeth can't find RLPTests. It fails with the error

Test setup error: no test cases matching filter or all test cases were disabled

[winsvega]

This is boost error. Make sure the path to test repo is correct. What is /foobar ?

[AlexKnauth]

The directory within the Docker container. The -v .../ethereum/tests:/foobar option to docker run should put the contents of ethereum/tests on my filesystem into /foobar inside the Docker container.

[winsvega]

try out testeth -t RlpTests

[AlexKnauth]

Oh, with RlpTests instead of RLPTests it's working!

It's case sensitive, with a different case convention than the folder names. Thank you.

The command:

docker run \
    --mount type=bind,source="/Users/Alex/Documents/GitHub/ethereum/tests",target=/foobar \
    ethereum/testeth:nightly \
    -t RlpTests \
    -- --testpath /foobar

Succeeds on both the develop branch and my rlp-0x branch.

[winsvega]

Ready to merge?

[AlexKnauth]

I think it's ready on my end.