docs: def extend_src_text(self, content, context, text_list, category):
          """Extend the source text list with the gathered text data."""
  
          prefix = self.prefix + '-' if self.prefix else ''
  
          for comment, line, encoding in text_list:
              content.append(
                  filters.SourceText(
                      textwrap.dedent(comment),
                      "%s (%d)" % (context, line),
                      encoding,
                      prefix + category
                  )
              )