small refactoring of docstring processing. don't output anything for epytext fields when formatting docs for the summary table (matches what epytext does)
small refactoring of docstring processing.
don't output anything for epytext fields when formatting docs for the
summary table (matches what epytext does)

hawkowl/pydoctor,chevah/pydoctor,chevah/pydoctor,hawkowl/pydoctor,jelmer/pydoctor,jelmer/pydoctor,jelmer/pydoctor