def transform_description(self, content_metadata_item):
full_description = content_metadata_item.get('<STR_LIT>') or '<STR_LIT>'<EOL>if <NUM_LIT:0> < len(full_description) <= self.LONG_STRING_LIMIT:  <EOL><INDENT>return full_description<EOL><DEDENT>return content_metadata_item.get('<STR_LIT>') or content_metadata_item.get('<STR_LIT:title>') or '<STR_LIT>'<EOL>
Return the transformed version of the course description.

We choose one value out of the course's full description, short description, and title
depending on availability and length limits.