Nitpicks

src/emitter.rs

@@ -21,7 +21,6 @@ impl <'a> LexicalContext<'a> {
 	    is_tail: false,
 	}
     }
-    #[allow(dead_code)]
     fn new(parent: &'a LexicalContext<'a>) -> Self {
 	LexicalContext {
 	    parent: Some(parent),

src/main.rs

@@ -16,15 +16,15 @@ struct Cli {
     file: PathBuf,
     #[clap(short, long, help="Emit a parse tree")]
     parse: bool,
-    #[clap(short, long, help="Cross-compile to ECMAScript")]
+    #[clap(short, long, help="Cross compile to ECMAScript")]
     ecmascript: bool,
-    #[clap(long, help="Only run the pre-processor")]
+    #[clap(long, help="Run the preprocessor")]
     preprocess: bool,
 }
 
 fn main() {
     let cli = Cli::parse();
-    let mut file = File::open(&cli.file).expect("Could not read file");
+    let mut file = File::open(&cli.file).expect("Couldn't read file");
     let mut prgm = String::new();
     file.read_to_string(&mut prgm).unwrap();
     if cli.preprocess {