Fails to format an enum declaration with no enums defined

[orischwartz]

This java code causes the formatter to throw an exception:

public enum Empty {;}

Minimal testcase:

  @Test
  public void formatsEmptyEnums() throws FormatterException {
    String input = "public enum Empty{;}";
    List<String> expectedLines = asList("public enum Empty {", "  ;", "}", "");

    assertEquals(Joiner.on("\n").join(expectedLines), new Formatter().formatSource(input));
  }

Fails with the following stacktrace:

com.google.googlejavaformat.java.FormatterException: 1:2: error: expected token: ';'; generated } instead
	at com.google.googlejavaformat.java.Formatter.getFormatReplacements(Formatter.java:260)
	at com.google.googlejavaformat.java.Formatter.formatSource(Formatter.java:234)
	at com.google.googlejavaformat.java.Formatter.formatSource(Formatter.java:202)

Tested against 1.6-SNAPSHOT at 579772a