Alter regex to allow apostrophes in document titles

When parsing the content of pig content packages, the regex to look for the
following pattern: href="/documents/%slug%">%Document title% would break if the
document title included a '. This fix now stops the capture at '> OR ">

lib/trough/pig/hooks.rb

@@ -76,7 +76,7 @@ def determine_text_change(key, content_chunk)
       def find_documents(value)
         # Find all links to /documents/:slug and return the slugs
         return [] if value.nil?
-        value.scan(/href=\S*\/documents\/(\S+[^\\])\\?['"]/).flatten
+        value.scan(/href=\S*\/documents\/(\S+[^\\])\\?['"]>/).flatten
       end
 
       def unlink_document_usages