public static void GeneratePageSourceLookup(Arguments arguments, PageResources pageResources)
{
// Gather file paths.
int trimIndex = arguments.TroubleshooterRoot !.Length;
Dictionary <string, string> sourceLookup = pageResources
.Where(pair =>
pair.Value.Location == ResourceLocation.Site &&
pair.Value.Type == ResourceType.Markdown
).ToDictionary(pair => pair.Value.OutputLinkPath !, pair => pair.Key[trimIndex..].Replace('\\', '/'));
