docs: fix broken marketplace link and markup errors

Fix the double-encoded VS Marketplace URL in Nightly Builds, remove the stray handbook preamble closing tag, and close the inline code quote in the declaration publishing docs.

Author: EduardF1

packages/documentation/copy/en/Nightly Builds.md

@@ -31,7 +31,7 @@ A direct way to do this is to open or create your workspace's `.vscode/settings.
 "typescript.tsdk": "<path to your folder>/node_modules/typescript/lib"
 ```
 
-Alternatively, if you simply want to run the nightly editing experience for JavaScript and TypeScript in Visual Studio Code without changing your workspace version, you can run the [JavaScript and TypeScript Nightly Extension](https://marketplace.visualstudio.com/items?itemName%253Dms-vscode.vscode-typescript-next)
+Alternatively, if you simply want to run the nightly editing experience for JavaScript and TypeScript in Visual Studio Code without changing your workspace version, you can run the [JavaScript and TypeScript Nightly Extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.vscode-typescript-next)
 
 ### Sublime Text
 

packages/documentation/copy/en/declaration-files/Publishing.md

@@ -33,7 +33,6 @@ For example:
 
 Note that the `"typings"` field is synonymous with `types`, and could be used as well.
 
-
 ## Dependencies
 
 All dependencies are managed by npm.
@@ -136,7 +135,7 @@ When you want to only change the resolution for a single file at a time, you can
 }
 ```
 
-On TypeScript 4.0 and above, an import for `"package-name"` would resolve to `./index.d.ts` and for 3.9 and below `"./index.v3.d.ts`.
+On TypeScript 4.0 and above, an import for `"package-name"` would resolve to `./index.d.ts` and for 3.9 and below `"./index.v3.d.ts"`.
 
 Note that redirections only affect the _external_ API of a package; import resolution within a project is not affected by `typesVersions`. For example, a `d.ts` file in the previous example containing `import * as foo from "./index"` will still map to `index.d.ts`, not `index.v3.d.ts`, whereas another package importing `import * as foo from "package-name"` _will_ get `index.v3.d.ts`.
 

packages/documentation/copy/en/handbook-v2/Basics.md

@@ -4,7 +4,7 @@ layout: docs
 permalink: /docs/handbook/2/basic-types.html
 oneline: "Step one in learning TypeScript: The basic types."
 preamble: >
-  <p>Welcome to the first page of the handbook. If this is your first experience with TypeScript - you may want to start at one of the '<a href='https://www.typescriptlang.org/docs/handbook/intro.html#get-started'>Getting Started</a>' guides</a>
+  <p>Welcome to the first page of the handbook. If this is your first experience with TypeScript - you may want to start at one of the '<a href='https://www.typescriptlang.org/docs/handbook/intro.html#get-started'>Getting Started</a>' guides
 ---
 
 Each and every value in JavaScript has a set of behaviors you can observe from running different operations.