Fixes broken open file command

CHANGELOG.md

@@ -14,6 +14,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 - Removes `-m` flag from `git log` when following renames (using `--follow`), because it ends up returning all merge commits (regardless if the file in question was changed or not)
 
+### Fixed
+
+- Fixes the broken _Open File_ command on the root node of the _File History_ and _Line History_ views
+
 ## [9.6.0] - 2019-04-08
 
 ### Added

src/views/viewCommands.ts

@@ -36,6 +36,8 @@ import {
 } from './nodes';
 import { ContributorNode } from './nodes/contributorNode';
 import { Strings } from '../system/string';
+import { FileHistoryNode } from './nodes/fileHistoryNode';
+import { LineHistoryNode } from './nodes/lineHistoryNode';
 
 export interface RefreshNodeCommandArgs {
     maxCount?: number;
@@ -373,9 +375,13 @@ export class ViewCommands implements Disposable {
         return commands.executeCommand(Commands.DiffWithWorking, node.uri, args);
     }
 
-    private openFile(node: CommitFileNode | ResultsFileNode | StashFileNode | StatusFileNode) {
+    private openFile(
+        node: CommitFileNode | FileHistoryNode | LineHistoryNode | ResultsFileNode | StashFileNode | StatusFileNode
+    ) {
         if (
             !(node instanceof CommitFileNode) &&
+            !(node instanceof FileHistoryNode) &&
+            !(node instanceof LineHistoryNode) &&
             !(node instanceof ResultsFileNode) &&
             !(node instanceof StatusFileNode)
         ) {