_helm s3 init_ message is missing a slash

[horacimacias]

When using an s3 bucket without index.yaml, the error message states:

The index file does not exist by the path s3://bucketname/index.yaml. If you haven't initialized the repository yet, try running "helm s3 init s3:/bucketname"

That is missing a slash after "s3:/". If you run the command as is you'll get:

upload index to s3: uri s3:/bucketname/index.yaml protocol is not s3

The error message needs to have a double slash after s3:

[horacimacias]

Created #78

[hypnoglow]

Fixed in #78 , thanks @horacimacias