Minor edits to IDE guide for clarity (#42)

Author: kmahar

docs/setup-and-ide-alternatives.md

@@ -1,27 +1,28 @@
-## Setting up  
+## Installing Swift
 
 The [supported platforms](https://swift.org/platform-support/) for running Swift on the server and the [ready-built tools packages](https://swift.org/download/) are all hosted on swift.org together with installation instructions. There you also can find the [language reference documentation](https://swift.org/documentation/).
 
-## IDE and Swift-aware editor alternatives
+## IDEs/Editors with Swift Support
 
-There are a few different options for doing the actual coding with completions etc depending on what platform you are using, a non-exhastive list:
+A number of editors you may already be familiar with have support for writing Swift code. Here we provide a non-exhaustive list of such editors and relevant plugins/extensions, sorted alphabetically.
 
-[Atom IDE support](https://atom.io/packages/ide-swift)
+* [Atom IDE support](https://atom.io/packages/ide-swift)
 
-[CLion](https://www.jetbrains.com/help/clion/swift.html)
+* [CLion](https://www.jetbrains.com/help/clion/swift.html)
 
-[Emacs plugin](https://github.com/swift-emacs/swift-mode)
+* [Emacs plugin](https://github.com/swift-emacs/swift-mode)
 
-[VIM plugin](https://github.com/keith/swift.vim)
+* [VIM plugin](https://github.com/keith/swift.vim)
 
-[Visual Studio Code](https://code.visualstudio.com)
+* [Visual Studio Code](https://code.visualstudio.com)
+    * [Optional code completion plugin](https://marketplace.visualstudio.com/items?itemName=vknabel.vscode-swift-development-environment)
 
-[Visual Studio Code optional code completion plugin](https://marketplace.visualstudio.com/items?itemName=vknabel.vscode-swift-development-environment)
+* [Xcode](https://developer.apple.com/xcode/ide/)
 
-[Xcode](https://developer.apple.com/xcode/ide/)
+## Language Server Protocol (LSP) Support
 
-## Support for other editors using LSP
+The [SourceKit-LSP project](https://github.com/apple/sourcekit-lsp) provides a Swift implementation of the [Language Server Protocol](https://microsoft.github.io/language-server-protocol/), which provides features such as code completion and jump-to-definition in supported editors. 
 
-Additionally, the [SourceKit-LSP project](https://github.com/apple/sourcekit-lsp) has both an [extensive list of editors that supports it](https://github.com/apple/sourcekit-lsp/tree/main/Editors) and instructions on how to get completion in your favourite editor.
+The project has both an [extensive list of editors that support it](https://github.com/apple/sourcekit-lsp/tree/main/Editors) and setup instructions for those editors, including many of those listed above.
 
 _Do you know about another IDE or IDE plugin that is missing? Please submit a PR to add them here!_