Rewrap documentation example for legibility [ci-skip]

Author: jonathanhefner

guides/source/api_documentation_guidelines.md

@@ -227,12 +227,11 @@ An example with a predicate:
 ```ruby
 # Returns true if the collection is empty.
 #
-# If the collection has been loaded
-# it is equivalent to <tt>collection.size.zero?</tt>. If the
-# collection has not been loaded, it is equivalent to
-# <tt>!collection.exists?</tt>. If the collection has not already been
-# loaded and you are going to fetch the records anyway it is better to
-# check <tt>collection.length.zero?</tt>.
+# If the collection has been loaded it is equivalent to
+# +collection.size.zero?+. If the collection has not been loaded,
+# it is equivalent to +!collection.exists?+. If the collection has
+# not already been loaded and you are going to fetch the records
+# anyway it is better to check +collection.length.zero?+.
 def empty?
   if loaded?
     size.zero?