This is the behavior in every version I tried (5.9.3 and 5.4.5), and I reviewed the FAQ for entries about "decorator" mark the second decorator as wrong, or at least ...

When writing PL/pgSQL functions, the syntax highlighting stops working inside the function body if it is defined using the standard PostgreSQL syntax with AS ...

Abstract: Radio frequency desensitization issues comprise two components: noise radiation sources and the transfer function from noise sources to the victim antenna. For modern electronic products, ...