Merge pull request dotnet#86 from anotherkabab/fix_dnx_osx

Fix dnx syntax in installing-core-osx.rst dotnet#82

Author: richlander

docs/getting-started/installing-core-osx.rst

@@ -142,7 +142,7 @@ You are now ready to run your app under .NET Core. As you can guess, however, be
 .. code-block:: console
 
     dnvm use 1.0.0-beta5-11649 -r coreclr
-    dnx . run
+    dnx run
 
     Hello, OSX
     Love from CoreCLR.