Merge pull request #47 from Byron/master

Prevent overflows by increasing  ring buffer size

syntex_syntax/src/print/pp.rs

@@ -163,9 +163,9 @@ pub struct PrintStackElem {
 const SIZE_INFINITY: isize = 0xffff;
 
 pub fn mk_printer<'a>(out: Box<io::Write+'a>, linewidth: usize) -> Printer<'a> {
-    // Yes 3, it makes the ring buffers big enough to never
+    // Yes 55, it makes the ring buffers big enough to never
     // fall behind.
-    let n: usize = 3 * linewidth;
+    let n: usize = 55 * linewidth;
     debug!("mk_printer {}", linewidth);
     let token = vec![Token::Eof; n];
     let size = vec![0; n];