Use preconstructed formatting options

Reduce GC pressure by avoiding repeated construction of large options
objects

ILSpy/Languages/CSharpLanguage.cs

@@ -548,10 +548,13 @@ namespace ICSharpCode.ILSpy
 					((ComposedType)astType).PointerRank--;
 			}
 
-			astType.AcceptVisitor(new CSharpOutputVisitor(w, FormattingOptionsFactory.CreateAllman()));
+			astType.AcceptVisitor(new CSharpOutputVisitor(w, TypeToStringFormattingOptions));
 			return w.ToString();
 		}
 
+	    static readonly CSharpFormattingOptions TypeToStringFormattingOptions = FormattingOptionsFactory.CreateEmpty();
+
+
 		public override string FormatPropertyName(PropertyDefinition property, bool? isIndexer)
 		{
 			if (property == null)