JuliaLang/julia — pull request #9002 by ninjin (2014-11-14 04:40:36+00:00)
Title: RFC: Documenting the type promotion used by `merge()`

@ivarne requested [an update of the docs](https://github.com/JuliaLang/julia/pull/8883#issuecomment-61463222) to the changes to `merge()` in #8883, since it now promotes the key/value-types of the resulting associative collection if necessary.