Associative array printing problems

[KennyTM~]

On Jun 23, 11 02:45, bearophile wrote:
> Printing associative arrays in a decent way is not a luxury, it's a basic skill I expect D writeln to have.
>
> This is reduced from a program related to the coding Kata Nineteen, Word Chains. The problem asks to create the longest chain of words. This function creates an associative array where the keys are the start chars of words, and the values are sets of words. For simplicity in D2 I have implemented the string sets as bool[string].
>
[snip]
 >
> Bye,
> bearophile

Basically this is a reiteration of 
http://d.puremagic.com/issues/show_bug.cgi?id=4605