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Join two strings with another string in between.

Twine\Str::join( string $string [, string $glue = ' ' ] ) : Twine\Str

Parameters

$string	The string to be joined
$glue	A string to use as the glue

$first = new Twine\Str('john');
        $last = new Twine\Str('pinkerton');

        $first->join($last); // Returns 'john pinkerton'

$min = new Twine\Str('1');
        $max = new Twine\Str('100');

        $min->join($max, '-'); // Returns '1-100'

$file = new Twine\Str('noclist.txt');

        $file->join('bak', '.'); // Returns 'noclist.txt.bak'