unwanted ; appended at the end of some messages when using quotes
As reported by @fkautz at https://github.com/gitterHQ/gitter/issues/612:
Example output: in each case, no ; was ever typed: "one" "github.com/example/two"; "one.two/three"; "http://github.com/example/one"
The problem appears to be that "github.com/example/two" becomes "github.com/example/two", which then gets incorrectly autolinked to "<a href="....">github.com/example/two"</a>;