Update the constant WhatIf description (#780)

Author: adityapatwardhan

src/Model/Constants.cs

@@ -86,7 +86,7 @@ internal static partial class Constants
         internal const string LocaleEnUs = "en-US";
         internal const string skippingMessageFmt = "'{0}' exists, skipping. Use -Force to overwrite.";
         internal const string ConfirmParameterDescription = "Prompts you for confirmation before running the cmdlet.";
-        internal const string WhatIfParameterDescription = "Tells PowerShell to run the command in a mode that only reports what would happen, but not actually let the command run or make changes.";
+        internal const string WhatIfParameterDescription = "Runs the command in a mode that only reports what would happen without performing the actions.";
 
         // TODO: ProgressAction is not a common parameter for all versions of PowerShell.
         //  This should not be added under all circumstances.

test/Pester/NewMarkdownHelp.Tests.ps1

@@ -654,7 +654,7 @@ Write-Host 'Hello World!'
 
         It 'should have a description for Confirm and WhatIf parameters' {
             $file | Should -FileContentMatch 'Prompts you for confirmation before running the cmdlet.'
-            $file | Should -FileContentMatch 'Tells PowerShell to run the command in a mode that only reports what would happen, but not actually let the command run or make changes.'
+            $file | Should -FileContentMatch 'Runs the command in a mode that only reports what would happen without performing the actions.'
         }
     }
 }