FIXUP: Use \keyword instead of \tcode for "sizeof" in example's comment.

Author: burblebee

source/declarations.tex

@@ -2435,8 +2435,8 @@
 
 typedef struct BB { int C[2]; } *B, C;
 void g() {
-  sizeof(B()->C[1]);            // OK, \tcode{sizeof(}expression\tcode{)}
-  sizeof(auto()->C[1]);         // error: \tcode{sizeof} of a function returning an array
+  sizeof(B()->C[1]);            // OK, \tcode{\keyword{sizeof}(}expression\tcode{)}
+  sizeof(auto()->C[1]);         // error: \keyword{sizeof} of a function returning an array
 }
 \end{codeblock}
 \end{example}