[basic] Fix inconsistency between here and [temp.type]p1: define when two

template-ids referring to variable template specializations are the same.
This is the clear and unambiguous intent.

Fixes #239.

Author: zygoloid

source/basic.tex

@@ -72,7 +72,8 @@
 the same operator, or
 \item they are \grammarterm{conversion-function-id}{s} formed
 with the same type, or
-\item they are \grammarterm{template-id}{s} that refer to the same class or function~(\ref{temp.type}), or
+\item they are \grammarterm{template-id}{s} that refer to the same class,
+function, or variable~(\ref{temp.type}), or
 \item they are the names of literal operators~(\ref{over.literal}) formed with
 the same literal suffix identifier.
 \end{itemize}