Refactor parser using bytes.Reader

Previous benchmark result (22dcd07 Move buffer to reader),

BenchmarkParse-2  500   19534400 ns/op  4656335 B/op  81163 allocs/op

New benchmark result,

BenchmarkParse-2  20000    71120 ns/op    35368 B/op    549 allocs/op

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/test/test.go b/lib/test/test.go
index 0a71e34d..a937f3a9 100644
--- a/lib/test/test.go
+++ b/lib/test/test.go
@@ -53,9 +53,10 @@ func Assert(t *testing.T, name string, exp, got interface{}, equal bool) {
 
 		printStackTrace(t)
 
-		t.Fatalf("\n"+
-			">>> Expecting %s '%+v'\n"+
-			"    got '%+v'\n", name, exp, got)
+		t.Fatalf(">>> Expecting %s,\n"+
+			"'%+v'\n"+
+			"     got,\n"+
+			"'%+v'\n", name, exp, got)
 		os.Exit(1)
 	}
 }