error message for topic is not clear enough (example:c++)

When add c++ into topic, it shows

Topics must start with a letter or number and can include hyphens.

well, it is not really helpful (at least to me) to let someone know the corrent form is cpp.

And actually c++ meets this requirement. :no_mouth: 

擷取.PNG

Good point! Staff will probably log this soon as a bug report / feature request!

Hi @cuteapple,

Thank you very much for taking the time to write this feedback, I’ve logged internally.

Best,

Andrea