Contributing DocFX Mono updates (#319)

Author: guardrex

CONTRIBUTING.md

@@ -93,7 +93,6 @@ DocFX requires the .NET Framework on Windows or Mono for Linux/macOS.
   ```
   docfx --serve
   ```
-	
 * In a browser, navigate to `http://localhost:8080`.
 
 ### Mono instructions
@@ -103,22 +102,15 @@ DocFX requires the .NET Framework on Windows or Mono for Linux/macOS.
   ```
   brew install mono
   ```
-
 * Download the [latest version of DocFX](https://github.com/dotnet/docfx/releases).
-* Extract the archive to */bin/docfx*.
-* Create an alias for **docfx**:
+* Extract the archive to *$HOME/bin/docfx*.
+* Create a pair of aliases for **docfx** in a bash shell. The first alias is used to build the documentation. The second alias is used to build and serve the documentation.
 
   ```
-  function docfx {
-    mono $HOME/bin/docfx/docfx.exe
-  }
-    
-  function docfx-serve {
-    mono $HOME/bin/docfx/docfx.exe serve _site
-  }
+  alias docfx='mono $HOME/bin/docfx/docfx.exe'
+  alias docfx-serve='mono $HOME/bin/docfx/docfx.exe --serve'
   ```
-
-* Run `docfx` from the root of the repo to build the site, and `docfx-serve` to view the site at `http://localhost:8080`.
+* Execute `docfx` from the root of the repo to build the site. Execute `docfx-serve` to view the site at `http://localhost:8080`.
 
 ## Voice and tone