In the current release of emoncms, when you hover over graph feeds with long labels (>20), they get truncated with ellipses append.
The solution that I have applied to my local installation is to simply comment out the following code from function
"Emoncms/widget/graph.js/graph_init_editor()"
...
if (name && name.length>20) {
name = name.substr(0,20)+"..";
...
I've not observed any negative side effects from doing this. Just remember to delete the browser cache (or use Cognito/Private) for the change to take effect.
Viv Lloyd