Version

4.2.0

Test Case

https://codesandbox.io/s/6llwm7m8zz

Steps to reproduce

<BrowserRouter basename="/foo/bar"> <Route path="/" component={App}/> </BrowserRouter> 

<Link to="/" /> 

Expected vs. Actual Behavior

the link takes me to http://host/foo/bar/ (with trailing slash) when I expect http://host/foo/bar (without trailing slash)