Nim is actually case sensitive on the first character only, so your list of identifiers are not all equivalent. Just thought I'd point that out for correctness sake.
Again just for correctness your last identifier isn't legal in Nim. You aren't allowed to start an identifier with an underscore, and you can't have two underscores together.
> it's the underscore insensitivity that makes it difficult to use standard search tools.
I personally don't like the feature, but what do you find difficult about using /my_?[vV]ariable/ to search for any of myvariable, my_variable or myVariable?
