Bug or intentionally under-documented "\c databasename;" behavior?

Hey,

I expected the following to tell me: database "testdb;" does not exist

Instead the connection attempt was successful.

postgres=# create database testdb;
CREATE DATABASE
postgres=# \c testdb;
You are now connected to database "testdb" as user "vagrant".

Specifically, the trailing semi-colon on the testdb is being treated, apparently, as a second parameter to \c (or just plain ignored which seems wrong too); which itself is a surprise given the absence of whitespace, and \c documents that - passed as a parameter is an acceptable way to omit a parameter so the semi-colon should have been considered as a username.

David J.