Fixed small typos, grammar mistakes, and edited conciseness in markdown documentation files

AUTHORS.md

@@ -141,6 +141,7 @@ TypeScript is authored by:
  - Eli Barzilay
  - Elizabeth Dinella
  - Ely Alamillo
+ - Eric Cheng
  - Eric Grube
  - Eric Tsang
  - Erik Edrosa

CODE_OF_CONDUCT.md

@@ -1 +1 @@
-This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information, see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected]) with any additional questions or comments.

CONTRIBUTING.md

@@ -54,14 +54,14 @@ In general, things we find useful when reviewing suggestions are:
 2. A copy of the TypeScript code. See the next steps for instructions.
 3. [Node](https://nodejs.org), which runs JavaScript locally. Current or LTS will both work.
 4. An editor. [VS Code](https://code.visualstudio.com) is the best place to start for TypeScript.
-5. The gulp command line tool, for building and testing changes. See the next steps for how to install it.
+5. The gulp command-line tool, for building and testing changes. See the next steps for how to install it.
 
 ## Get Started
 
 1. Install node using the version you downloaded from [nodejs.org](https://nodejs.org).
 2. Open a terminal.
 3. Make a fork—your own copy—of TypeScript on your GitHub account, then make a clone—a local copy—on your computer. ([Here are some step-by-step instructions](https://github.com/anitab-org/mentorship-android/wiki/Fork%2C-Clone-%26-Remote)). Add `--depth=1` to the end of the `git clone` command to save time.
-4. Install the gulp command line tool: `npm install -g gulp-cli`
+4. Install the gulp command-line tool: `npm install -g gulp-cli`
 5. Change to the TypeScript folder you made: `cd TypeScript`
 6. Install dependencies: `npm ci`
 7. Make sure everything builds and tests pass: `gulp runtests-parallel`
@@ -118,7 +118,7 @@ There are three relevant locations to be aware of when it comes to TypeScript's
 * `lib`: the location of the last-known-good (LKG) versions of the files which are updated periodically.
 * `built/local`: the build output location, including where `src/lib` files will be copied to.
 
-Any changes should be made to [src/lib](https://github.com/Microsoft/TypeScript/tree/main/src/lib). **Most** of these files can be updated by hand, with the exception of any generated files (see below).
+Any changes should be made to [src/lib](https://github.com/Microsoft/TypeScript/tree/main/src/lib). **Most** of these files can be updated by hand, except for any generated files (see below).
 
 Library files in `built/local/` are updated automatically by running the standard build task:
 

SECURITY.md

@@ -12,7 +12,7 @@ If you believe you have found a security vulnerability in any Microsoft-owned re
 
 Instead, please report them to the Microsoft Security Response Center (MSRC) at [https://msrc.microsoft.com/create-report](https://msrc.microsoft.com/create-report).
 
-If you prefer to submit without logging in, send email to [[email protected]](mailto:[email protected]).  If possible, encrypt your message with our PGP key; please download it from the [Microsoft Security Response Center PGP Key page](https://www.microsoft.com/en-us/msrc/pgp-key-msrc).
+If you prefer to submit without logging in, send an email to [[email protected]](mailto:[email protected]).  If possible, encrypt your message with our PGP key; please download it from the [Microsoft Security Response Center PGP Key page](https://www.microsoft.com/en-us/msrc/pgp-key-msrc).
 
 You should receive a response within 24 hours. If for some reason you do not, please follow up via email to ensure we received your original message. Additional information can be found at [microsoft.com/msrc](https://www.microsoft.com/msrc). 
 

src/lib/README.md

@@ -1,6 +1,6 @@
 # Read this!
 
-The files within this directory are copied and deployed with TypeScript as the set of APIs  available as a part of the JavaScript language.
+The files within this directory are copied and deployed with TypeScript as the set of APIs available as a part of the JavaScript language.
 
 There are three main domains of APIs in `src/lib`: