From Axel:

No '@' in file IDs for MSI.


git-svn-id: http://root.cern.ch/svn/root/trunk@20368 27541ba8-7e3a-0410-8455-c3a389f83636

build/package/msi/makemsi.cxx

@@ -153,6 +153,7 @@ string MSIDirEntry::GetMyId() const {
    std::replace(ret.begin(), ret.end(), '-', '_');
    std::replace(ret.begin(), ret.end(), '#', '_');
    std::replace(ret.begin(), ret.end(), '~', '_');
+   std::replace(ret.begin(), ret.end(), '@', '_');
    return ret;
 }