Throw exception on a simple use-case

[vors]

I created file with content

function Download-File($url, $file) {
    $webclient = New-Object System.Net.WebClient
    $webclient.DownloadFile($url,$file)
}

Run Document cmdlet and get this error message

Message text:

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Sublime Text
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get-command : The term 'Download-File' is not recognized as the name of a 
cmdlet, function, script file, or operable program. Check the spelling of the 
name, or if a path was included, verify that the path is correct and try again.
At C:\Users\sevoroby\AppData\Roaming\Sublime Text 3\Packages\Powershell Help 
Generator\Get-HelpTemplate.ps1:5 char:6
+ $c = get-command $commandName
+      ~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (Download-File:String) [Get-Comm 
   and], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException,Microsoft.PowerShell.Co 
   mmands.GetCommandCommand

Cannot index into a null array.
At C:\Users\sevoroby\AppData\Roaming\Sublime Text 3\Packages\Powershell Help 
Generator\Get-HelpTemplate.ps1:24 char:5
+     $parameter = $c.Parameters[$_]
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

Cannot index into a null array.
At C:\Users\sevoroby\AppData\Roaming\Sublime Text 3\Packages\Powershell Help 
Generator\Get-HelpTemplate.ps1:25 char:5
+     $parameters += $c.Parameters[$_]
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : NullArray

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OK   
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