Fix a pprint test for fixed-length vecs

Author: bstrie

src/test/pretty/blank-lines.rs

@@ -1,13 +1,13 @@
 // pp-exact
-fn f() -> [int]/3 {
+fn f() -> [int * 3] {
     let picard = 0;
 
     let data = 1;
 
     let worf = 2;
 
 
-    let enterprise = [picard, data, worf]/_;
+    let enterprise = [picard, data, worf];