Docstrings have landed in Julia trunk and will be in 0.4! https://github.com/JuliaLang/julia/pull/8791 The use of markdown is particularly nice.
miniblog.
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An impressive range of features have landed in IntelliJ 2018.1: https://www.jetbrains.com/idea/specials/idea/whatsnew.html
A ton of additional lints, but also some interesting completion features: using isInstace to infer types, and also leveraging JSON schema!
elisp-refs support has landed in emacspeak! https://emacspeak.blogspot.co.uk/2016/11/emacspeak-450-idealdog-unleashed.html I'm flattered (and getting some useful feature suggestions!)