support charset=utf8 as synonym for charset="utf-8"
add charset=latin1 to latin1 examples and rtest cases
digraph G {
+graph [charset=latin1]
node [fontsize=10]
a [label = "áâãäåæçèéêëìíîïðñòóôõöøùúûü"];
}
digraph "g" {
graph [
concentrate="true" /* Edges are merged and have common endpoints*/
+ charset=latin1
fontsize = "14"
fontname = "Helvetica"
fontcolor = "black"
--- /dev/null
+diGraph G{\r
+graph [charset="utf8"]\r
+1[label="Umlaut"];\r
+2[label="ü"];\r
+3[label="ä"];\r
+4[label="ö"];\r
+1->2;\r
+1->3;\r
+1->4;\r
+}\r