style(classnames): wrap to block if statement

Author: yarastqt

Diff for: packages/classnames/classnames.tsx

@@ -24,7 +24,11 @@ export function classnames() {
         }
 
         uniqueCache.add(value);
-        if (className.length > 0) className += ' ';
+
+        if (className.length > 0) {
+            className += ' ';
+        }
+
         className += value;
     }