Fix more misspelled comments and strings.

src/libsyntax/print/pp.rs

@@ -233,7 +233,7 @@ pub fn mk_printer(out: Box<io::Writer>, linewidth: uint) -> Printer {
  *
  * There is a parallel ring buffer, 'size', that holds the calculated size of
  * each token. Why calculated? Because for Begin/End pairs, the "size"
- * includes everything betwen the pair. That is, the "size" of Begin is
+ * includes everything between the pair. That is, the "size" of Begin is
  * actually the sum of the sizes of everything between Begin and the paired
  * End that follows. Since that is arbitrarily far in the future, 'size' is
  * being rewritten regularly while the printer runs; in fact most of the
@@ -434,7 +434,7 @@ impl Printer {
         assert!((self.right != self.left));
     }
     pub fn advance_left(&mut self, x: Token, l: int) -> io::IoResult<()> {
-        debug!("advnce_left ~[{},{}], sizeof({})={}", self.left, self.right,
+        debug!("advance_left ~[{},{}], sizeof({})={}", self.left, self.right,
                self.left, l);
         if l >= 0 {
             let ret = self.print(x.clone(), l);