Fix code style issues with ESLint

ereuse_devicehub/static/js/main_inventory.build.js

@@ -2,7 +2,7 @@
 
 function _classStaticPrivateFieldSpecGet(receiver, classConstructor, descriptor) { _classCheckPrivateStaticAccess(receiver, classConstructor); _classCheckPrivateStaticFieldDescriptor(descriptor, "get"); return _classApplyDescriptorGet(receiver, descriptor); }
 
-function _classCheckPrivateStaticFieldDescriptor(descriptor, action) { if (descriptor === undefined) { throw new TypeError("attempted to " + action + " private static field before its declaration"); } }
+function _classCheckPrivateStaticFieldDescriptor(descriptor, action) { if (descriptor === undefined) { throw new TypeError(`attempted to ${  action  } private static field before its declaration`); } }
 
 function _classCheckPrivateStaticAccess(receiver, classConstructor) { if (receiver !== classConstructor) { throw new TypeError("Private static access of wrong provenance"); } }