fix: Fix building value for joined strings

src/griffe/agents/nodes.py

@@ -775,6 +775,10 @@ def _get_constant_value(node: NodeConstant) -> str:
     return repr(node.value)
 
 
+def _get_constant_value_no_repr(node: NodeConstant) -> str:
+    return node.value
+
+
 def _get_dict_value(node: NodeDict) -> str:
     pairs = zip(node.keys, node.values)
     gen = (f"{'None' if key is None else get_value(key)}: {get_value(value)}" for key, value in pairs)  # noqa: WPS509
@@ -843,7 +847,10 @@ def _get_isnot_value(node: NodeIsNot) -> str:
 
 
 def _get_joinedstr_value(node: NodeJoinedStr) -> str:
-    return "".join(get_value(value) for value in node.values)
+    _node_value_map[NodeConstant] = _get_constant_value_no_repr
+    result = repr("".join(get_value(value) for value in node.values))
+    _node_value_map[NodeConstant] = _get_constant_value
+    return result
 
 
 def _get_keyword_value(node: NodeKeyword) -> str: