'/save all' does not save startup snippets

To reproduce:

-> int a
| Added variable a of type int

-> class A {}
| Added class A

-> /save all src.repl

-> /list all

  s1 : import java.util.*;
  s2 : import java.io.*;
  s3 : import java.math.*;
  s4 : import java.net.*;
  s5 : import java.util.concurrent.*;
  s6 : import java.util.prefs.*;
  s7 : import java.util.regex.*;
  s8 : void printf(String format, Object... args) { System.out.printf(format, args); }
   1 : int a;
   2 : class A {}


cat src.repl
int a;
class A {}