I'd like to draw an arrow using TikZ where I can specify more than one tip (or tail). This is presumably technically possible since the
>> tip is a "doubled" tip: defining
>=diamond produces a double diamond tip. Also, quoting from the
arrows section of the manual:
The spacing arrow tips are useful for combining them with other arrows to get arrows that do not touch the end of the line.
Which is, admittedly, vague enough that I could be interpreting it incorrectly.
But what is the actual syntax for combining two tips? Just listing them one after another doesn't work.