add backticks (`) to surrounding pairs when editing doc comments

[laralove143]

the docs follow markdown which allows surrounding with backticks, but currently, the text is replaced instead of being surrounded, which is very annoying since this works in other languages

[Veykril]

I'm not sure if we can do this conditionally to work just in doc comments

[laralove143]

me neither, but even if its allowed globally, is there a big downside to that?

[kylebarron]

Any possibility this could be reopened? It's helpful to be able to surround doc text with backticks

[laralove143]

for context, this is possible on intellij rust