[std] Use \keyword for 'typename'.

Author: jensmaurer

source/declarations.tex

@@ -1325,7 +1325,7 @@
 a type to be deduced\iref{dcl.spec.auto}.
 \indextext{deduction!class template arguments}%
 A \grammarterm{type-specifier} of the form
-\opt{\tcode{typename}} \opt{\grammarterm{nested-name-specifier}} \grammarterm{template-name}
+\opt{\keyword{typename}} \opt{\grammarterm{nested-name-specifier}} \grammarterm{template-name}
 is a placeholder for
 a deduced class type\iref{dcl.type.class.deduct}.
 The \grammarterm{nested-name-specifier}, if any, shall be non-dependent and

source/templates.tex

@@ -260,14 +260,14 @@
 There is no semantic difference between
 \tcode{class}
 and
-\tcode{typename}
+\keyword{typename}
 in a
 \grammarterm{type-parameter-key}.
-\tcode{typename}
+\keyword{typename}
 followed by an
 \grammarterm{unqualified-id}
 names a template type parameter.
-\tcode{typename}
+\keyword{typename}
 followed by a
 \grammarterm{qualified-id}
 denotes the type in a non-type
@@ -797,7 +797,7 @@
 \end{note}
 \begin{note}
 As is the case with the
-\tcode{typename}
+\keyword{typename}
 prefix, the
 \keyword{template}
 prefix is allowed
@@ -4294,10 +4294,10 @@
 A \grammarterm{typename-specifier}
 denotes the type or class template
 denoted by the \grammarterm{simple-type-specifier}\iref{dcl.type.simple}
-formed by omitting the keyword \tcode{typename}.
+formed by omitting the keyword \keyword{typename}.
 \begin{note}
 The usual qualified name lookup\iref{basic.lookup.qual} applies
-even in the presence of \tcode{typename}.
+even in the presence of \keyword{typename}.
 \end{note}
 \begin{example}
 \begin{codeblock}