Support HTML writer

Author: TLouf

sphinx/writers/_html4.py

@@ -151,10 +151,20 @@ def visit_desc_parameterlist(self, node: Element) -> None:
         self.required_params_left = sum([isinstance(c, addnodes.desc_parameter)
                                          for c in node.children])
         self.param_separator = node.child_text_separator
+        if node.get('is_multiline'):
+            self.body.append(self.starttag(node, 'dl'))
 
     def depart_desc_parameterlist(self, node: Element) -> None:
+        if node.get('is_multiline'):
+            self.body.append('</dl>\n\n')
         self.body.append('<span class="sig-paren">)</span>')
 
+    def visit_desc_parameterline(self, node: Element) -> None:
+        self.body.append(self.starttag(node, 'dd', ''))
+
+    def depart_desc_parameterline(self, node: Element) -> None:
+        self.body.append('</dd>')
+
     # If required parameters are still to come, then put the comma after
     # the parameter.  Otherwise, put the comma before.  This ensures that
     # signatures like the following render correctly (see issue #1001):