- Fix trailing whitespace missed by the bug described in #12755.
- Fix other style issues that have crept in over time (this can happen
when flake8 adds new checks with new versions)
* Adding a package for cardioid.
* Changing package to pass flake8
* Removing template leftovers per @ax3l 's advice
* Adding a homepage so tests pass.
* Removing whitespace for flake8
* Changing the name of master branch to match spack standards.