ParseTemplateAndGetArgumentNames is broken

[AndrewSav]

Many years ago, I asked for ParseTemplateAndGetArgumentNames and my wish was granted. However somewhere along the way it got broken.

Steps to reproduce:

	 foreach( var a in TemplateParser.ParseTemplateAndGetArgumentNames("#{a.b.c}"))
	 {
	 	Console.WriteLine(a);
	 }

What I'm expecting to see:

a.b.c

What I'm actually seeing:

a
b
c

The templating engine still correctly treats a.b.c as a single var, but ParseTemplateAndGetArgumentNames regressed somewhere and returns wrong result.