This is experimental. More of the HTMLParser methods need to be fleshed out. So far the basic stuff works as long as there is no invalid HTML in the document.
Adjust pattern to allow for escaped hashes, but take care to not treat escaped escapes before hashes as escaped hashes. Close #762.
This was adapted from 11408e50 of the md3 branch.
Serializer should only escape & in attributes if not part of & Better regex avoid Unicode and `_` in amp detection. In general, we don't want to escape already escaped content, but with code content, we want literal representations of escaped content, so have code content explicitly escape its content before placing in AtomicStrings. Closes #669.
Fixes #435.
Previously, instances of the Markdown class were represented as any one of 'md', 'md_instance', or 'markdown'. This inconsistency made it difficult when developing extensions, or just maintaining the existing code. Now, all instances are consistently represented as 'md'. The old attributes on class instances still exist, but raise a DeprecationWarning when accessed. Also on classes where the instance was optional, the attribute always exists now and is simply None if no instance was provided (previously the attribute wouldn't exist).
All processors and patterns now get "registered" to a Registry. Each item is given a name (string) and a priority. The name is for later reference and the priority can be either an integer or float and is used to sort. Priority is sorted from highest to lowest. A Registry instance is a list-like iterable with the items auto-sorted by priority. If two items have the same priority, then they are listed in the order there were "registered". Registering a new item with the same name as an already registered item replaces the old item with the new item (however, the new item is sorted by its newly assigned priority). To remove an item, "deregister" it by name or index. A backwards compatible shim is included so that existing simple extensions should continue to work. DeprecationWarnings will be raised for any code which calls the old API. Fixes #418.