Function preprocess_multiline_braces 

pub fn preprocess_multiline_braces(source: &str) -> String

Preprocessing utilities for multiline statement merging Preprocess source to merge ALL multiline statements with braces Handles: synth, bind, pattern, let with map/array, emit, etc. Example: bind myMidi -> myBassline { velocity: 80, bpm: 150 } becomes: bind myMidi -> myBassline { velocity: 80, bpm: 150 }