Remove trailing semicolon in macro used in expression position (yewstack#2127)

Author: vrmiguel

packages/yew/src/virtual_dom/mod.rs

@@ -286,7 +286,7 @@ impl Apply for Attributes {
                     }
                     macro_rules! set {
                         ($new:expr) => {
-                            Self::set_attribute(el, key!(), $new);
+                            Self::set_attribute(el, key!(), $new)
                         };
                     }