Early return rather than conditional raise

Author: PeterJCLaw

Rakefile

@@ -59,9 +59,11 @@ task :validate_sidebar_tree => [:build] do
 
   def check_url(url)
     if url.end_with?("/") then
-      raise "Imprecise target url '#{url}' in sidebar (did you mean '#{url[..-2]}'?)\n\n" unless File.directory?("_site#{url}")
+      return if File.directory?("_site#{url}")
+      raise "Imprecise target url '#{url}' in sidebar (did you mean '#{url[..-2]}'?)\n\n"
     else
-      raise "Imprecise target url '#{url}' in sidebar (did you mean '#{url}/'?)\n\n" unless File.file?("_site#{url}.html")
+      return if File.file?("_site#{url}.html")
+      raise "Imprecise target url '#{url}' in sidebar (did you mean '#{url}/'?)\n\n"
     end
   end