lib/tilt/template.rb in tilt-1.4.0 vs lib/tilt/template.rb in tilt-1.4.1

@@ -192,10 +192,13 @@
 
         source.force_encoding(template_encoding)
         template.force_encoding(template_encoding)
       end
 
-      source << preamble << "\n" << template << "\n" << postamble
+      # https://github.com/rtomayko/tilt/issues/193
+      warn "precompiled_preamble should return String (not Array)" if preamble.is_a?(Array)
+      warn "precompiled_postamble should return String (not Array)" if postamble.is_a?(Array)
+      source << [preamble, template, postamble].join("\n")
 
       [source, preamble.count("\n")+1]
     end
 
     # A string containing the (Ruby) source code for the template. The