Updated to return values in double quotes

Author: erwinvanhunen

src/Commands/Base/Completers/ContentTypeCompleter.cs

@@ -16,9 +16,8 @@ public IEnumerable<CompletionResult> CompleteArgument(string commandName, string
             IEnumerable<ContentType> result = PnPConnection.Current.Context.LoadQuery(PnPConnection.Current.Context.Web.AvailableContentTypes.Include(f => f.Name));
             PnPConnection.Current.Context.ExecuteQueryRetry();
             foreach (var ct in result.Where(l => l.Name.StartsWith(wordToComplete, StringComparison.InvariantCultureIgnoreCase)))
-            {
-                var ctName = $"'{ct.Name}'";
-                yield return new CompletionResult(ctName);
+            {                
+                yield return new CompletionResult($"\"{ct.Name}\"");
             }
         }
     }

src/Commands/Base/Completers/FieldInternalNameCompleter.cs

@@ -17,7 +17,7 @@ public IEnumerable<CompletionResult> CompleteArgument(string commandName, string
             PnPConnection.Current.Context.ExecuteQueryRetry();
             foreach (var field in result.Where(l => l.InternalName.StartsWith(wordToComplete, StringComparison.InvariantCultureIgnoreCase)))
             {
-                yield return new CompletionResult($"'{field.InternalName}'");
+                yield return new CompletionResult($"\"{field.InternalName}\"");
             }
         }
     }

src/Commands/Base/Completers/ListNameCompleter.cs

@@ -16,7 +16,7 @@ public IEnumerable<CompletionResult> CompleteArgument(string commandName, string
             PnPConnection.Current.Context.ExecuteQueryRetry();
             foreach (var list in result.Where(l => l.Title.StartsWith(wordToComplete, StringComparison.InvariantCultureIgnoreCase)))
             {
-                yield return new CompletionResult($"'{list.Title}'");
+                yield return new CompletionResult($"\"{list.Title}\"");
             }
 
         }