The `hasSummary` and `hasDescription` functions are currently useless as
they check if the corresponding `summary` and `description` are present.
However, these values are set to a default value of `""`, and so these
functions always return true.
This PR changes these functions to check if the summary and description
are just whitespace, which is presumably closer to their original
intent.
@math-fehr
@zero9178
e49068624c