In a google-style docstring, this is problematic:
Returns:
str: Some really long description that requires more
than one line
Since the additional text (i.e., "than one line") is indented,
napolean gets confused and incorrectly formats the description. The
fix is to align subsequent lines with the first:
Returns:
str: Some really long description that requires more
than one line.
Along the way I also added missing return types as needed.
c2cb7091e2