Bug working with branch prefixes not ending with a slash

[k-bx]

I had a setup where features were named as "abc-123-small-desc" (because of migration from jira), and started with same approach for github-pivotal-flow, but first time I tried to start a feature it suggested to me that branch-name will be abc-/<my-input>. Apparently, bug is in these lines:

https://github.com/donaldpiret/github-pivotal-flow/blob/master/lib/github_pivotal_flow/story.rb#L283:

prefix = "#{prefix.strip}/" unless prefix.strip[-1,1] == '/'

It hard-codes a slash in the end of a prefix. I think it shouldn't do this and either just take prefix, or do additional check if there's no '/' at the end -- don't append it also.