Properly escape "<" and ">" in api-doc documentation.
Since all documentation is rendered via HTML, the characters "<" and ">" have to be HTML-quoted, otherwise strange things (omission, unintended renderings) might occur.
E.g. the sentence
Define an interface between a page and an ADP <include> similar to the page_contract.
was rendered as
Define an interface between a page and an ADP similar to the page_contract.
- fixed validity of HTML (missing <dd>) - use <dt>foo</dt><dd>...</dd> instead of <dt><b>foo></b><dd>...</dd> and other variants. This improves stylability.