diff --git a/expr_rs/__init__.pyi b/expr_rs/__init__.pyi
index 8dfb139..0e40c3d 100644
--- a/expr_rs/__init__.pyi
+++ b/expr_rs/__init__.pyi
@@ -1,5 +1,2 @@
 def eval(expr: str) -> float:
-    """
-    Evaluate an expression.
-    """
-    ...
+    """Evaluate an expression."""