Bug #104647 for Graph-ReadWrite: Graph::Writer::Dot round-trip of graph name with spaces

In Graph-ReadWrite 2.07 on recent debian i386 perl 5.20.2, if Graph::Reader::Dot reads a foo.dot like below which has a space in the graph name then the output of Graph::Writer::Dot does not re-write the necessary quotes around the name. For example foo.pl and foo.dot below gives one-two digraph Hello World { /* list of nodes */ "one"; "two"; /* list of edges */ "one" -> "two"; } $_[0]->YYCurtok ID $_[0]->YYCurval World @$_[0]->YYExpect { $_[0]->YYLexer CODE(0x8a40e6c) substr($_[0]->YYData->{INPUT},0,21) ... Syntax error. where I hoped a Reader -> Writer -> Reader round-trip would succeed. The string quoting at http://www.graphviz.org/doc/info/lang.html says literal " as \" too, if that would be a shared subroutine for vertex etc too. Not sure if Graph::Reader::Dot decodes \" as such, but if the Graph.pm attributes are used by others than could be any string in the name.