Changed files to use strict mode, to make "let" work with node 5 (#10219)

* used strict mode

* Removed extra space in readme.md, dummy change for queueing checks for PR.

Author: himanshu yadav

Tasks/UseDotNetV2/README.md

@@ -3,7 +3,7 @@
 ## Overview
 
 The Use .NET Core task acquires a specific version of [.NET Core](https://docs.microsoft.com/en-us/dotnet/core/tools/?tabs=netcore2x) from internet or the tools cache and adds it to the PATH of the Azure Pipelines Agent (hosted or private). Use this task to change the version of .NET Core used in subsequent tasks like [.NET Core cli task](https://github.com/Microsoft/azure-pipelines-tasks/tree/master/Tasks/DotNetCoreCLIV2).
-Adding this task before the [.NET Core cli task](https://github.com/Microsoft/azure-pipelines-tasks/tree/master/Tasks/DotNetCoreCLIV2) in a build definition ensures that the version would be available at the time of  building, testing and publishing your app.
+Adding this task before the [.NET Core cli task](https://github.com/Microsoft/azure-pipelines-tasks/tree/master/Tasks/DotNetCoreCLIV2) in a build definition ensures that the version would be available at the time of building, testing and publishing your app.
 
 The tool installer approach also allows you to decouple from the agent update cycles. If the .NET Core version you are looking for is missing from the Azure Pipelines agent (Hosted or Private), then you can use this task to get the right version installed on the agent.
 

Tasks/UseDotNetV2/Tests/L0.ts

@@ -1,3 +1,4 @@
+"use strict";
 const assert = require('assert');
 const ttm = require('azure-pipelines-task-lib/mock-test');
 const os = require('os');

Tasks/UseDotNetV2/Tests/usedotnetTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as os from 'os';
 import * as tl from 'azure-pipelines-task-lib/task';
 import { Constants } from '../versionutilities';

Tasks/UseDotNetV2/Tests/versionFetcherGetDownloadUrlFailTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import * as os from 'os';
 import { toolrunner } from './mocks/mockedModels'

Tasks/UseDotNetV2/Tests/versionFetcherGetDownloadUrlPassTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import * as os from 'os';
 import { toolrunner } from './mocks/mockedModels'

Tasks/UseDotNetV2/Tests/versionFetcherGetVersionInfoFailTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import { HttpClientResponse } from "./mocks/mockedModels"
 var mockery = require('mockery');

Tasks/UseDotNetV2/Tests/versionFetcherGetVersionInfoTestsCorrect.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import { HttpClientResponse } from "./mocks/mockedModels"
 var mockery = require('mockery');

Tasks/UseDotNetV2/Tests/versionInstallerDownloadAndInstallTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import * as os from 'os';
 import { toolrunner } from './mocks/mockedModels'

Tasks/UseDotNetV2/Tests/versionInstallerIsVersionInstalledTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 import * as path from 'path';
 import { Constants } from "../versionutilities";

Tasks/UseDotNetV2/Tests/versionInstallerTests.ts

@@ -1,3 +1,4 @@
+"use strict";
 import * as tl from 'azure-pipelines-task-lib/task';
 var mockery = require('mockery');
 mockery.enable({