Make `C()`, where `C` is a class name, a compile-time error.

docs/language/dartLangSpec.tex

Index: docs/language/dartLangSpec.tex
diff --git a/docs/language/dartLangSpec.tex b/docs/language/dartLangSpec.tex
index d0f62f2bbce8c323cf7d0d51e4f19cb4c584e135..79f57343dc8160f7844b51024a6ad6d4f681d060 100644
--- a/docs/language/dartLangSpec.tex
+++ b/docs/language/dartLangSpec.tex
@@ -3710,7 +3710,7 @@ where $id$ is an identifier.
 If there exists a lexically visible declaration named $id$, let $f_{id}$ be the innermost such declaration. Then:
 \begin{itemize}
 \item
-If $f_{id}$ is a prefix object, a compile-time error occurs.
+If $f_{id}$ is a prefix object or a type literal, a compile-time error occurs.

[Lasse Reichstein Nielsen, 2016/10/24 10:36:59]

We could add "or type variable", but it's not as necessary - it is handled by "a
variable" below making this a function expression invocation equivalent to
`T.call()` which is what is actually implemented.

[Lasse Reichstein Nielsen, 2016/10/24 10:36:59]

This case was unhandeled in the existing specification, so it fell through to
`this.C()` which wasn't what any implementation actually implements.

 \item
  If $f_{id}$ is a local function, a library function, a library or static getter or a variable then $i$ is interpreted as a function expression invocation (\ref{functionExpressionInvocation}).
  \item