Upgrading to Ruby 1.8.7 and Haml 3.1.8

doc/environment.txt

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+ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]
+actionmailer (2.3.18)
+actionpack (2.3.18)
+activerecord (2.3.18)
+activeresource (2.3.18)
+activesupport (2.3.18)
+acts_as_versioned (0.2.3)
+atomic (1.1.10)
+bundler (1.3.5)
+bundler-unload (1.0.1)
+haml (3.1.8)
+hoe (1.3.0)
+hpricot (0.6)
+i18n (0.6.4)
+icalendar (1.0)
+json_pure (1.8.0)
+minitest (4.7.5)
+multi_json (1.7.7)
+quietbacktrace (0.1.1)
+rack (1.1.6, 1.0.1)
+rails (2.3.18)
+rake (0.8.7)
+redgreen (1.2.2)
+rubyforge (2.0.4)
+rubygems-update (1.4.2, 1.4.0, 1.3.2)
+rvm (1.11.3.8)
+sqlite3-ruby (1.3.1)
+thread_safe (0.1.0)
+tzinfo (0.3.37)
+ZenTest (3.11.1)