`::<` still looks weird

[matthew-e-brown]

Issue #1145 attempts to fix the Turbofish operator in Rust. Unfortunately, it doesn't account for when text directly follows or preceeds the operator:

I have confirmed I'm using 6.2. Here you can see the newly fixed ::< and >:: ligatures alongside the still-weird ones:

The outer : still raises away from the inner :.

[tonsky]

Thanks! Will look into it in the next version