Vovodroid

@thisiskeithb > as well as ensure all CI tests pass. Can I run all these tests in my local environment?

I tried to run `make tests-all-local` from Visual Studio Code Terminal window on Windows10, for clean bugfix-2.1.x branch. All tests fail with error `avr-g++: error: CreateProcess: No such file or...

I didn't succeed in getting platformio working in WSL, so eventually I run all (including Visual Studio Code) inside VMware Ubuntu guest. But when I run `make tests-all-local` it seems...

I updated PR to pass all tests. But when new feature is disabled by default no actual build is performed. Also when Sanity.h detects conflicting option for some config test...

I guess it's better to extract axis movement check from planner to define/function to avoid double code: ``` if (true NUM_AXIS_GANG( && !block->steps.a, && !block->steps.b, && !block->steps.c, && !block->steps.i, &&...

By a way, @abortz - why A and B factors are swapped? To be RepRap/Klipper compatible? It's so confusing to be other than mathematics notation Ax^2+Bx+C. It could be endless...

> It's just not a popular option. So can we make it Ax^2+Bx+C as it should be?

> the [M592 - Nonlinear Extrusion Control](https://marlinfw.org/docs/gcode/M592.html) page can be updated for clarity instead. I don't think it will help. Anyone (including myself) tests underextrusion, goes to any polynomial regression...

I'll do soon refactoring I talked about: > to extract axis movement check from planner to define/function to avoid double code:

> it has been reviewed and tested by @abortz I hove refactoring I did is also good (at least it works for me). What about making polynomial `Ax^2+Bx+C`? Go with...