Re: [svgwg] Add circular arc path command 'R'. (#767)

Since this makes arcs pretty easy to write by hand you might naively think you could just tag on rounded corners on a rectangle by setting an intermediate-arc point at the corner:
`M50,100 h50r5,0 5,5 v50r0,5 -5,5 h-50r-5,0 -5,-5v-50r0,-5 5,-5 ` But, since the point given is on the arc this creates:

![r-example3](https://user-images.githubusercontent.com/3302478/70925677-81db7500-1fe0-11ea-8950-1b6da06de1dc.png)

The corner arc point would be at (r * sqrt(2)/2, r * sqrt(2)/2) distance away from the center rather than at (r,r).

But, you could also do silly things like.
`M50,100r-20,-20 0,0h50r20,-20 0,0v50r20,20 0,0h-50r-20,20 0,0,v-50` (Keep in mind, I freehanded this command.)

![r-example4](https://user-images.githubusercontent.com/3302478/70926227-99672d80-1fe1-11ea-938d-9af9ed791b68.png)


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Received on Monday, 16 December 2019 16:54:31 UTC