Update the Development documentation for the swift-argument-parser. Also provide copyable command lines for the other two dependencies as well, since we're having to add one for the 0.3.0 tag for argument parser (looks odd to have the command line for two out of the four repositories).

Author: abertelrud

Documentation/Development.md

@@ -65,6 +65,7 @@ $ swift test -c release --filter PerformanceTests
 ## Using a Trunk Snapshot
 
 1. [Download](https://swift.org/download/#snapshots) and install the latest Trunk Development snapshot.
+
 2. Run the following commands depending on your platform.
 
 ### macOS
@@ -98,9 +99,23 @@ Note: Make sure the directory for llbuild is called "llbuild" and not
 
 4. Clone [Yams](https://github.com/jpsim/yams) beside the package manager directory.
 
+```sh
+$ git clone https://github.com/jpsim/yams
+```
+
 5. Clone [swift-driver](https://github.com/apple/swift-driver) beside the package manager directory.
 
-6. Build the Swift Package Manager.
+```sh
+$ git clone https://github.com/apple/swift-driver
+```
+
+6. Clone [swift-argument-parser](https://github.com/apple/swift-argument-parser) beside the package manager directory and check out tag 0.3.0.
+
+```sh
+$ git clone https://github.com/apple/swift-argument-parser --branch 0.3.0
+```
+
+7. Build the Swift Package Manager.
 
 ```sh
 $ cd swiftpm
@@ -121,7 +136,7 @@ $ /path/to/swiftpm/.build/x86_64-apple-macosx/debug/swift-package init
 $ /path/to/swiftpm/.build/x86_64-apple-macosx/debug/swift-build
 ```
 
-5. Test the Swift Package Manager.
+8. Test the Swift Package Manager.
 
 ```sh
 $ Utilities/bootstrap test