Fix doubled `"` in `ChangeSetTests >> #test_misc_package_02a`
...causing test to fail.
@REM use --debug as arg to debug failed test cases
..\..\..\stx\projects\smalltalk\stx --debug --noBanner -I --execute SelfTestRunner.st
@REM ..\..\..\stx\projects\smalltalk\stx --debug --noInfoPrint --noBanner --exitOnInternalError --exitOnMessageSendError -I --execute SelfTestRunner.st