Convert line endings when doing exact pretty-print testing

For the benefit of windows

src/test/compiletest/runtest.rs

@@ -113,6 +113,14 @@ fn run_pretty_test(cx: &cx, props: &test_props, testfile: &str) {
       }
     };
     let actual = srcs.(ivec::len(srcs) - 1u);
+    
+    if option::is_some(props.pp_exact) {
+        // Now we have to care about line endings
+        let cr = "\r";
+        check str::is_not_empty(cr);
+        actual = str::replace(actual, cr, "");
+        expected = str::replace(expected, cr, "");
+    }
 
     compare_source(expected, actual);