yet another multiplier for string hashing, 136671 produces no collisions for wamerican-huge and 31 for wamerican-insane

utils/StringBuffer.h

@@ -11,7 +11,7 @@ class StringBuffer final {
     char data[N];
 
     void addToHash(char c) {
-        hash = 257 * hash + c;
+        hash = 136671 * hash + c;
     }
 
     void addToHash(int from, int to) {