Describe the bug
The duotone variant of the circle-notch icon spins noticeably of center. This does not happen with the other variant of the circle-notch.
This is also visible on the FA-site itself.
To Reproduce
<i class="fas fa-spin fa-circle-notch fa-4x"></i><br><br>
<i class="far fa-spin fa-circle-notch fa-4x"></i><br><br>
<i class="fal fa-spin fa-circle-notch fa-4x"></i><br><br>
<i class="fad fa-spin fa-circle-notch fa-4x"></i><br><br>

fa-4x was used to make it better visible.
Expected behavior
It should be centered correctly 馃槃 
Version and implementation
Version: 5.10.1
Browser and version: Chrome 76.0.3809.100
Bug report checklist
Hi!
Thanks for being part of the Font Awesome Community and thanks for reporting this.
Given that wobbling cannot be solved in the CSS framework (ref: https://fontawesome.com/how-to-use/on-the-web/styling/animating-icons#issues), this issue is also present in the SVG framework.
I can confirm that there is a slight offset between fas fa-circle-notch and fad fa-circle notch
Demo: https://jsfiddle.net/tagliala/97r8f4y6/4/
The offset is also visible in the docs (fastly switch between these pages):
Let's assign @sensibleworld
This _should_ be fixed in the latest 5.10.2 release. Let me know if it's still an issue and I'll re-open.
Verified solved, thanks @sensibleworld!