Apply suggestions from code review

Co-authored-by: Vincent Biret <[email protected]>

Author: peombwa

src/Microsoft.OpenApi.Hidi/Formatters/PowerShellFormatter.cs

@@ -177,7 +177,7 @@ private static IList<OpenApiParameter> ResolveFunctionParameters(IList<OpenApiPa
 
         private void AddAddtionalPropertiesToSchema(OpenApiSchema schema)
         {
-            if (schema != null && !_schemaLoop.Contains(schema) && "object".Equals(schema?.Type, StringComparison.OrdinalIgnoreCase))
+            if (schema != null && !_schemaLoop.Contains(schema) && "object".Equals(schema.Type, StringComparison.OrdinalIgnoreCase))
             {
                 schema.AdditionalProperties = new OpenApiSchema() { Type = "object" };
 

src/Microsoft.OpenApi/Services/CopyReferences.cs

@@ -121,10 +121,7 @@ private void EnsureResponsesExists()
 
         private void EnsurRequestBodiesExists()
         {
-            if (_target.Components.RequestBodies == null)
-            {
-                _target.Components.RequestBodies = new Dictionary<string, OpenApiRequestBody>();
-            }
+            _target.Components.RequestBodies ??= new Dictionary<string, OpenApiRequestBody>();
         }
     }
 }