Changes to chains with block indent
Changes to chains with block indent

* More often combine a chain item to the previous line (if it is a block)
* Don't indent if the parent is a block

This is not perfect and doesn't pass tests, but I need to refactor to make more
progress

aidancully/rust,graydon/rust,aidancully/rust,SingingTree/rustfmt,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,rust-lang/rustfmt,graydon/rust,aidancully/rust,aidancully/rust,SingingTree/rustfmt,rust-lang/rustfmt,graydon/rust,aidancully/rust