Use codespan for *much* prettier error reporting.

src/syntax/tokens.rs

@@ -41,7 +41,9 @@ impl fmt::Display for Token {
             Token::Number((Some(8), v)) => write!(f, "'0o{:o}'", v),
             Token::Number((Some(10), v)) => write!(f, "'{}'", v),
             Token::Number((Some(16), v)) => write!(f, "'0x{:x}'", v),
-            Token::Number((Some(b), v)) => write!(f, "Invalidly-based-number<base={},val={}>", b, v),
+            Token::Number((Some(b), v)) => {
+                write!(f, "Invalidly-based-number<base={},val={}>", b, v)
+            }
             Token::Variable(s) => write!(f, "'{}'", s),
             Token::Error => write!(f, "<error>"),
         }
@@ -64,7 +66,6 @@ fn parse_number(
         Some(radix) => (radix, &value.slice()[2..]),
     };
 
-    println!("HERE! (radix {}, slice |{}|", radix, strval);
     let intval = i128::from_str_radix(strval, radix as u32)?;
     Ok((base, intval))
 }