module documentation

Transforms needed by most or all documents: - `Decorations`: Generate a document's header & footer. - `ExposeInternals`: Expose internal attributes. - `Messages`: Placement of system messages generated after parsing. - `FilterMessages`: Remove system messages below verbosity threshold. - `TestMessages`: Like `Messages`, used on test runs. - `StripComments`: Remove comment elements from the document tree. - `StripClassesAndElements`: Remove elements with classes in `self.document.settings.strip_elements_with_classes` and class values in `self.document.settings.strip_classes`. - `SmartQuotes`: Replace ASCII quotation marks with typographic form.

Class Decorations Populate a document's decoration element (header, footer).
Class ExposeInternals Expose internal attributes if ``expose_internals`` setting is set.
Class FilterMessages Remove system messages below verbosity threshold.
Class Messages Place any system messages generated after parsing into a dedicated section of the document.
Class SmartQuotes Replace ASCII quotation marks with typographic form.
Class StripClassesAndElements Remove from the document tree all elements with classes in `self.document.settings.strip_elements_with_classes` and all "classes" attribute values in `self.document.settings.strip_classes`.
Class StripComments Remove comment elements from the document tree (only if the ``strip_comments`` setting is enabled).
Class TestMessages Append all post-parse system messages to the end of the document.