Format threading macro aligned after the -> ?

[tiejunhu]

Currently the threading macro is formatted as:

Are there any options to format it aligned after the -> ?

[mk]

Work around supporting this was started by @mhuebert in #37. Unfortunately it's gotten stale since then and I can't say when we'll get around to picking this up again. @tiejunhu feel free to try it and revive if it solves your problem.