(chocolateyGH-1067) Add elevated cmd example

Added additional example for cmd
Be careful, within the Here-String you need to double all the double quotes.
Add `cmd` example with note about spaces

src/chocolatey.resources/helpers/functions/Start-ChocolateyProcessAsAdmin.ps1

@@ -94,6 +94,14 @@ Start-ChocolateyProcessAsAdmin -Statements "$silentArgs" -ExeToRun $file -ValidE
 $psFile = Join-Path "$(Split-Path -parent $MyInvocation.MyCommand.Definition)" 'someInstall.ps1'
 Start-ChocolateyProcessAsAdmin "& `'$psFile`'"
 
+.EXAMPLE
+# This also works for cmd and is required if you have any spaces in the paths within your command
+$appPath = "$env:ProgramFiles\myapp"
+$cmdBatch = "/c `"$appPath\bin\installmyappservice.bat`""
+Start-ChocolateyProcessAsAdmin $cmdBatch cmd 
+# or more explicitly
+Start-ChocolateyProcessAsAdmin -Statements $cmdBatch -ExeToRun "cmd.exe"
+
 .LINK
 Install-ChocolateyPackage
 

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

@@ -111,6 +111,12 @@ 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 +179,4 @@ public class ChocolateyInstallTemplate
 #{{ChecksumTypex64}} - The checksum type for the 64-bit url | /ct64
 ";
     }
-}
+}