add hack to assets.rake to unblock the release train

rakefiles/assets.rake

@@ -10,11 +10,14 @@ end
 # the ENV_TOKENS to the templating context.
 def preprocess_with_mako(filename)
     # simple command-line invocation of Mako engine
+    # cdodge: the .gsub() are used to translate true->True and false->False to make the generated
+    # python actually valid python. This is just a short term hack to unblock the release train
+    # until a real fix can be made by people who know this better
     mako = "from mako.template import Template;" +
            "print Template(filename=\"#{filename}\")" +
            # Total hack. It works because a Python dict literal has
            # the same format as a JSON object.
-           ".render(env=#{ENV_TOKENS.to_json});"
+           ".render(env=#{ENV_TOKENS.to_json.gsub("true","True").gsub("false","False")});"
 
     # strip off the .mako extension
     output_filename = filename.chomp(File.extname(filename))