Function join

tests/qunit.js:1052–1061

( pre, arr, post )

		return o + '';
	};
	function join( pre, arr, post ) {
		var s = jsDump.separator(),
			base = jsDump.indent(),
			inner = jsDump.indent(1);
		if ( arr.join )
			arr = arr.join( ',' + s + inner );
		if ( !arr )
			return pre + post;
		return [ pre, inner + arr, base + post ].join(s);
	};
	function array( arr ) {
		var i = arr.length,	ret = Array(i);
		this.up();