in src/main/java/com/twitter/penguin/korean/util/CharArrayMap.java [340:347]
public String toString() {
final StringBuilder sb = new StringBuilder("{");
for (Map.Entry<Object, V> entry : entrySet()) {
if (sb.length() > 1) sb.append(", ");
sb.append(entry);
}
return sb.append('}').toString();
}