Exclude PSNativeCommandArgumentPassing variable (#2093)

* Exclude PSNativeCommandArgumentPassing variable

* Update UseDeclaredVarsMoreThanAssignments.tests.ps1

* Add missing comma in SpecialVars.cs

Author: bergmeister

Diff for: Engine/SpecialVars.cs

@@ -160,6 +160,7 @@ internal enum PreferenceVariable
         internal const string PSEmailServer = "PSEmailServer";
         internal const string PSDefaultParameterValues = "PSDefaultParameterValues";
         internal const string PSModuleAutoLoadingPreference = "PSModuleAutoLoadingPreference";
+        internal const string PSNativeCommandArgumentPassing = "PSNativeCommandArgumentPassing";
         internal const string pwd = "PWD";
         internal const string Null = "null";
         internal const string True = "true";
@@ -182,6 +183,7 @@ internal enum PreferenceVariable
                                                                     PSEmailServer,
                                                                     PSDefaultParameterValues,
                                                                     PSModuleAutoLoadingPreference,
+                                                                    PSNativeCommandArgumentPassing,
                                                                     pwd,
                                                                     Null,
                                                                     True,

Diff for: Tests/Rules/UseDeclaredVarsMoreThanAssignments.tests.ps1

@@ -58,6 +58,12 @@ function MyFunc2() {
             Should -Be 0
         }
 
+        It "does not flag `$PSNativeCommandArgumentPassing variable" {
+            Invoke-ScriptAnalyzer -ScriptDefinition '$PSNativeCommandArgumentPassing=None' -IncludeRule $violationName | `
+            Get-Count | `
+            Should -Be 0
+        }
+
         It "does not flag global variable" {
             Invoke-ScriptAnalyzer -ScriptDefinition '$global:x=$null' -IncludeRule $violationName  | `
             Get-Count | `