Old habbits die hard: !== instead of !=.

Author: gkellogg

lib/expand.js

@@ -421,7 +421,7 @@ api.expand = ({
     // and value is not, itself, a graph
     // index cases handled above
     if(container.includes('@graph') &&
-      !container.some(key => key == '@id' || key == '@index') &&
+      !container.some(key => key === '@id' || key === '@index') &&
       !_isGraph(expandedValue)) {
       // ensure expanded value is an array
       expandedValue = [].concat(expandedValue);