Avoid including children in repr().

It is tricky to get it right with lazy children. With non-lazy children,
the output can potentially be huge.

htpy/__init__.py

@@ -275,9 +275,6 @@ def _iter_context(self, ctx: dict[Context[t.Any], t.Any]) -> Iterator[str]:
         yield from _iter_node_context(self._children, ctx)
         yield f"</{self._name}>"
 
-    def __repr__(self) -> str:
-        return f"<{self.__class__.__name__} '{self}'>"
-
     # Allow starlette Response.render to directly render this element without
     # explicitly casting to str:
     # https://github.com/encode/starlette/blob/5ed55c441126687106109a3f5e051176f88cd3e6/starlette/responses.py#L44-L49
@@ -308,6 +305,9 @@ def __getitem__(self: ElementSelf, children: Node) -> ElementSelf:
         _validate_children(children)
         return self.__class__(self._name, self._attrs, children)  # pyright: ignore [reportUnknownArgumentType]
 
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} '<{self._name}{self._attrs}>...</{self._name}>'>"
+
 
 class HTMLElement(Element):
     def _iter_context(self, ctx: dict[Context[t.Any], t.Any]) -> Iterator[str]:
@@ -319,6 +319,9 @@ class VoidElement(BaseElement):
     def _iter_context(self, ctx: dict[Context[t.Any], t.Any]) -> Iterator[str]:
         yield f"<{self._name}{self._attrs}>"
 
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} '<{self._name}{self._attrs}>'>"
+
 
 def render_node(node: Node) -> _Markup:
     return _Markup("".join(iter_node(node)))

tests/test_element.py

@@ -19,7 +19,7 @@ def test_invalid_element_name() -> None:
 
 
 def test_element_repr() -> None:
-    assert repr(htpy.div("#a")) == """<Element '<div id="a"></div>'>"""
+    assert repr(htpy.div("#a")) == """<Element '<div id="a">...</div>'>"""
 
 
 def test_void_element_repr() -> None: