Split task format from internal storage

transaction_test.go

@@ -0,0 +1,9 @@
+package main
+
+import "testing"
+
+func TestTransactionFormat(t *testing.T) {
+	x := NewTransaction("12.34", "Amazon", "[Wed, 1 Apr 2020 10:14:11 -0400 (EDT)]", Chase)
+	t.Logf("%s", x.String())
+	t.Logf("%s", x.Format())
+}