hof/fmt: prettier rust plugin is failing on testcase

[verdverm]

disabled for now

386 : Container.withExec(args: ["hof", "run", "rs.txt"]): Container!
386 : [2.9s] | 
386 : [2.9s] | 
386 : [2.9s] | >>> exec hof fmt in.rs -v 1
386 : [2.9s] | [stdout]
386 : [2.9s] | formatting 1 file(s) from in.rs
386 : [2.9s] | 
386 : [2.9s] | InvalidDocError: Unexpected doc.type 'concat'.
386 : [2.9s] | Expected it to be 'cursor', 'indent', 'align', 'trim', 'group', 'fill', 'if-break', 'indent-if-break', 'line-suffix', 'line-suffix-boundary', 'line', 'label', or 'break-parent'.
386 : [2.9s] | 
386 : [2.9s] | while formatting source: error while formatting in.rs
386 : [2.9s] | encountered 1 errors while formatting
386 : [2.9s] | [exit status 1]
386 : [2.9s] | FAIL: rs.txt:1: unexpected exec command failure
386 : [2.9s] | 
386 : [2.9s] | >>> exec hof fmt in.rs -v 1
386 : [2.9s] | [stdout]
386 : [2.9s] | formatting 1 file(s) from in.rs
386 : [2.9s] | 
386 : [2.9s] | InvalidDocError: Unexpected doc.type 'concat'.
386 : [2.9s] | Expected it to be 'cursor', 'indent', 'align', 'trim', 'group', 'fill', 'if-break', 'indent-if-break', 'line-suffix', 'line-suffix-boundary', 'line', 'label', or 'break-parent'.
386 : [2.9s] | 
386 : [2.9s] | while formatting source: error while formatting in.rs
386 : [2.9s] | encountered 1 errors while formatting
386 : [2.9s] | [exit status 1]
386 : [2.9s] | FAIL: rs.txt:1: unexpected exec command failure
386 : [2.9s] | 
386 : Container.withExec ERROR [2.9s]

[verdverm]

probably worth considering making a dedicated formatter for rust using cargo-fmt or whatever they mainly use in the Rust community

the plugin has some good thoughts on the tradeoffs: https://github.com/jinxdash/prettier-plugin-rust