* generic.cs
(TypeManager.IsGenericMethod): We now return whether something is
an instantiated generic method (and not a generic method def).
(TypeManager.IsGenericMethodDefinition): New public method.
* typemanager.cs
(TypeManager.CSharpSignature): Only include type arguments for
"real" generic methods, not for any instantiated method.
(TypeManager.GetMethodName): Likewise, but also allow generic
method definitions here.
svn path=/trunk/mcs/; revision=56647
