jessevdk/go-flags — pull request #118 by mpobrien (2014-11-22 22:13:27+00:00)
Title: unknown option handler should be able to handle flags in --flag=value format

I realized there is an edge case in my previous pull request that wasn't covered, which is that if the flag is specified as a single string with "=" then the value itself doesn't appear in the parser state's args array. This should fix it by passing the parsed value from splitOption into the unknown option handler function.