Constructor Diagnostics Need Improvement

[jcburley]

Given e.g. (go.std.os/LinkError. ["one" "two"]), this diagnostic seems insufficient:

<repl>:1:1: Eval error: Index 2 is out of bounds [0..1]

It should specify how many elements are required in the vector.

Further, a type mismatch in one of the elements fails to specify which one has the problem:

user=> (go.std.os/LinkError. ["one" "two" :hey "there"])
<repl>:6:1: Eval error: Expected String, got Keyword
user=>

A suffix such as (element 2) would help.