Wire together initial label sanitization pass

src/main.rs

@@ -5,7 +5,7 @@ mod preprocess;
 mod world;
 
 use anyhow::anyhow;
-use labels::parse::print_labels;
+use labels::{parse::print_labels, process::process_labels};
 use preprocess::eval::Context;
 use std::{env, error::Error, fs, path::PathBuf, process::exit};
 use world::World;
@@ -55,6 +55,10 @@ fn main() -> Result<(), Box<dyn Error>> {
         }
     }
 
+    for mut board in &mut world.boards {
+        process_labels(&mut board);
+    }
+
     // Try to write a modified world file
     fs::write("tmp.zzt", world.to_bytes()?)?;