Description
There are many use cases where it is helpful to be able to split an entire string into an array of characters. In other query languages, passing in a null string ('') as the parameter achieves this. I believe the Gremlin step should behave the same way. For example
Current behavior
g.inject('Hello').split('') ['Hello']
Proposed new behavior
g.inject('Hello').split('') ['H','e','l','l','o']