Issue #2914711 by droplet: JS codestyle: no-useless-concat

core/.eslintrc.passing.json

@@ -3,7 +3,6 @@
   "rules": {
     "no-var": "off",
     "no-useless-escape": "off",
-    "no-useless-concat": "off",
     "no-use-before-define": "off",
     "no-throw-literal": "off",
     "no-shadow": "off",

core/modules/quickedit/js/theme.es6.js

@@ -149,9 +149,7 @@
           attributes.push(attr + ((attrMap[attr]) ? `="${attrMap[attr]}"` : ''));
         }
       }
-      html += `<button type="${button.type}" class="${button.classes}"` + ` ${attributes.join(' ')}>`;
-      html += button.label;
-      html += '</button>';
+      html += `<button type="${button.type}" class="${button.classes}" ${attributes.join(' ')}>${button.label}</button>`;
     }
     return html;
   };

core/modules/quickedit/js/theme.js

@@ -66,9 +66,7 @@
           attributes.push(attr + (attrMap[attr] ? '="' + attrMap[attr] + '"' : ''));
         }
       }
-      html += '<button type="' + button.type + '" class="' + button.classes + '"' + (' ' + attributes.join(' ') + '>');
-      html += button.label;
-      html += '</button>';
+      html += '<button type="' + button.type + '" class="' + button.classes + '" ' + attributes.join(' ') + '>' + button.label + '</button>';
     }
     return html;
   };