(chocolateyGH-1067) Add elevated cmd example

Having seen many packages with their calls written in a fragile manner and having perpetuated/contributed to some of the mess, I figured maybe I should offer a better example as penance.

src/chocolatey/infrastructure.app/templates/ChocolateyInstallTemplate.cs

@@ -111,6 +111,11 @@ public class ChocolateyInstallTemplate
 ## - https://chocolatey.org/docs/helpers-start-chocolatey-process-as-admin
 #Start-ChocolateyProcessAsAdmin 'STATEMENTS_TO_RUN' 'Optional_Application_If_Not_PowerShell' -validExitCodes $validExitCodes
 
+## To avoid quoting issues, you can also assemble your -Statements in another variable and pass it in
+# $appPath = "$env:ProgramFiles\appname" # Will resolve to C:\Program Files\appname
+# $statementsToRun = "/C `"$appPath\bin\installservice.bat`""
+# Start-ChocolateyProcessAsAdmin $statementsToRun cmd -validExitCodes $validExitCodes
+
 ## add specific folders to the path - any executables found in the chocolatey package 
 ## folder will already be on the path. This is used in addition to that or for cases 
 ## when a native installer doesn't add things to the path.
@@ -173,4 +178,4 @@ public class ChocolateyInstallTemplate
 #{{ChecksumTypex64}} - The checksum type for the 64-bit url | /ct64
 ";
     }
-}
+}