(#1185) Always pass in hook scripts event if empty

When passing package parameters into chocolateyScriptRunner.ps1, if
there are quotes, PowerShell can get confused. This ensures that we're
specifying the new hook arguments and passing nothing if there should be
nothing.

Author: corbob

src/chocolatey/infrastructure.app/services/PowershellService.cs

@@ -194,14 +194,14 @@ public string wrap_script_with_module(string script, IEnumerable<string> hookPre
 
         private string get_script_arguments(string script, IEnumerable<string> hookPreScriptPathList, IEnumerable<string> hookPostScriptPathList, ChocolateyConfiguration config)
         {
-            return "-packageScript '{0}' -installArguments '{1}' -packageParameters '{2}'{3}{4}{5}{6}".format_with(
+            return "-packageScript '{0}' -installArguments '{1}' -packageParameters '{2}'{3}{4} -preRunHookScripts {5} -postRunHookScripts {6}".format_with(
                 script,
                 prepare_powershell_arguments(config.InstallArguments),
                 prepare_powershell_arguments(config.PackageParameters),
                 config.ForceX86 ? " -forceX86" : string.Empty,
                 config.OverrideArguments ? " -overrideArgs" : string.Empty,
-                hookPreScriptPathList.Any() ? " -preRunHookScripts {0}".format_with(string.Join(",", hookPreScriptPathList)) : string.Empty,
-                hookPostScriptPathList.Any() ? " -postRunHookScripts {0}".format_with(string.Join(",", hookPostScriptPathList)) : string.Empty
+                hookPreScriptPathList.Any() ? "{0}".format_with(string.Join(",", hookPreScriptPathList)) : "$null",
+                hookPostScriptPathList.Any() ? "{0}".format_with(string.Join(",", hookPostScriptPathList)) : "$null"
              );
         }