Strip relative option just once

See #124

lib/jekyll/scholar/utilities.rb

@@ -62,7 +62,7 @@ module Jekyll
           end
 
           opts.on('-r', '--relative RELATIVE') do |relative|
-            @relative = relative
+            @relative = relative.to_s.strip
           end
 
           opts.on('-t', '--text TEXT') do |text|
@@ -575,7 +575,7 @@ module Jekyll
       end
 
       def link_target_for key
-        "#{base_url}#{relative.to_s.strip}##{[prefix, key].compact.join('-')}"
+        "#{base_url}#{relative}##{[prefix, key].compact.join('-')}"
       end
 
       def cite(keys)