Utility function in the [Tcl] library that generates the standard 'wrong # args' messages. From 8.5 onwards, it is aware of the chain of rewrites done by [interp alias] and [namespace ensemble] on the route from what the user typed to the point where the message is generated so that it can generate a sensible error message.

**Typical Use**
======c
int myCommandImplementation(
    ClientData clientData, Tcl_Interp *interp,
    int objc, Tcl_Obj *const objv[])
{
    if (objc != 3) { /* two arguments, plus command name */
        Tcl_WrongNumArgs(interp, 1, objv, "fooArg barArg");
        return TCL_ERROR;
    }
    /* The rest of the command implementation... */
}
======

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Frequently used with [Tcl_GetIndexFromObj]; T_WNA can use information provided through T_GIFO for better error message generation..

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