Which files should I tell my VCS to ignore when using Sphinx for documentation? [closed]

If you take a look at the contents of Makefile you’ll see something as follows:

BUILDDIR      = build

...

clean:
    -rm -rf $(BUILDDIR)/*

This means that make clean just removes the build directory so, with regard to version control, ignoring the contents of the build directory should be enough as you already suspected.