I have drawn two spiro curves in Inkscape. Both have the same endpoint, but when zooming in on the connection between these two curves, it does not look fine:
[![enter image description here](https://i.stack.imgur.com/WYCx8.jpg)](https://i.stack.imgur.com/WYCx8.jpg)

Note the gap between both curves. What I finally want to have is this (simulated using paint):
[![enter image description here](https://i.stack.imgur.com/gtOrq.jpg)](https://i.stack.imgur.com/gtOrq.jpg)

Getting both curves red is not the problem, but note the rounded edge that I want to have. How can I get this rounded edge? Thanks!