Fixed several linting errors

modules/validations/disconnected_highway.js

@@ -1,5 +1,8 @@
 import { t } from '../util/locale';
-import { utilDisplayName } from '../util';
+import {
+    utilDisplayName,
+    utilDisplayType
+} from '../util';
 import {
     ValidationIssueType,
     ValidationIssueSeverity,
@@ -40,7 +43,7 @@ export function validationDisconnectedHighway(context) {
                     if (preset && preset.name()) {
                         entityLabel = preset.name();
                     } else {
-                        entityLabel = utilDisplayType(entity.id)
+                        entityLabel = utilDisplayType(entity.id);
                     }
                 }
 

modules/validations/validation_issue.js

@@ -27,7 +27,7 @@ export function validationIssue(attrs) {
         throw new Error('Invalid attrs.type: ' + attrs.type);
     }
     if (!attrs.severity || !ValidationIssueSeverity.hasOwnProperty(attrs.severity)) {
-        throw new Error('Invalid attrs.severity: ' + attr.severity);
+        throw new Error('Invalid attrs.severity: ' + attrs.severity);
     }
     if (!attrs.message) throw new Error('attrs.message is empty');