Add option to {de}activate the ?.

[GrayJack]

In Rust it's pretty common to have a question mark followed by a dot and the ligature:

• makes the ligature unaligned with the rest of the code
• makes the highlight fail on some editors

Fira Code (Ligatures)

Fira Mono (No ligatures)

[tonsky]

I am not sure what are you saying. ?. shouldn’t be grouped?

[GrayJack]

Yes, @tonsky that is correct

[jearmstrong21]

For non-rustaceans: this is something like combining the ). in foo().bar

[tonsky]

Oh I see. I only saw it in Kotlin, and in Kotlin it’s a single operator, not ? and . combined. Makes sense to make a stylistic set then, thanks!

[mon-jai]

It would be better to be enabled by default.

?. is the optional chaining operator in JavaScript and it is popular among JavaScript developers.

[GrayJack]

For me personally, doesn't make a difference what is the default, as long as it is possible to toggle it. So as long most people are happy with the default, it works for me