The docs in environment.rb are not going to be rendered so it doesnt make sense to mark them up

railties/environments/environment.rb

@@ -22,7 +22,7 @@
 
   # Specify gems that this application depends on. 
   # They can then be installed with "rake gems:install" on new installations.
-  # You have to specify the <tt>:lib</tt> option for libraries, where the Gem name (<em>sqlite3-ruby</em>) differs from the file itself (_sqlite3_)
+  # You have to specify the :lib option for libraries, where the Gem name (sqlite3-ruby) differs from the file itself (_sqlite3_)
   # config.gem "bj"
   # config.gem "hpricot", :version => '0.6', :source => "http://code.whytheluckystiff.net"
   # config.gem "sqlite3-ruby", :lib => "sqlite3"