New comment by Eloitor on void-packages repository

https://github.com/void-linux/void-packages/pull/38129#issuecomment-1189853171

Comment:
I'm sorry, I don't know how to properly create the patch, what I did was:
``` bash
cd ~/repos
git clone https://github.com/Kozea/CairoSVG 
cd CairoSVG
# I removed the lines containing pytest-runner
git diff > pytest-runner.patch
```
When running `./xbps-src patch python3-CairoSVG` I get the error
```
=> python3-CairoSVG-2.5.2_1: patching: pytest-runner.patch.
3 out of 3 hunks FAILED -- saving rejects to file setup.cfg.rej
=> ERROR: python3-CairoSVG-2.5.2_1: do-patch_00-patches: 'patch -s ${_args} < "${_patch}" 2> /dev/null' exited with 1
```