"help show" uses old alias

[coandco]

Here's what typing help show into psysh outputs:

Usage:
 show [--ex [EX]] [--] [<target>]

Arguments:
 target  Function, class, instance, constant, method or property to show.

Options:
 --ex    Show last exception context. Optionally specify a stack index. (default: 1)

Help:
 Show the code for an object, class, constant, method or property, or the context
 of the last exception.
 
 cat --ex defaults to showing the lines surrounding the location of the last
 exception. Invoking it more than once travels up the exception's stack trace,
 and providing a number shows the context of the given index of the trace.
 
 e.g.
 >>> show $myObject
 >>> show Psy\Shell::debug
 >>> show --ex
 >>> show --ex 3

Note that it says "cat --ex" in the help message, but cat isn't a command or alias:

> cat

   Error  Undefined constant "cat".

[bobthecow]

Thanks for the heads up!