fix: Add source to class objects

PR #120: #120

Author: jakekaplan

src/pytkdocs/loader.py

@@ -460,8 +460,21 @@ def get_class_documentation(self, node: ObjectNode, select_members=None) -> Clas
         class_ = node.obj
         docstring = inspect.cleandoc(class_.__doc__ or "")
         bases = [self._class_path(b) for b in class_.__bases__]
+
+        source: Optional[Source]
+
+        try:
+            source = Source(*inspect.getsourcelines(node.obj))
+        except (OSError, TypeError) as error:
+            source = None
+
         root_object = Class(
-            name=node.name, path=node.dotted_path, file_path=node.file_path, docstring=docstring, bases=bases
+            name=node.name,
+            path=node.dotted_path,
+            file_path=node.file_path,
+            docstring=docstring,
+            bases=bases,
+            source=source,
         )
 
         # Even if we don't select members, we want to correctly parse the docstring