Don't try to format lists.

Author: josevalim

lib/code/formatter.ex

@@ -10,15 +10,9 @@ module Code::Formatter
   end
 
   def format_object(object)
-    if object != [] && Erlang.io_lib.printable_list(object)
-      object.flatten.to_bin
-    else
-      try
-        object.inspect
-      catch 'error: 'undef
-        "[Could not inspect object]"
-      end
-    end
+    object.inspect
+  catch 'error: 'undef
+    "[Could not inspect object]"
   end
 
   def format_catch('error, {'badsyntax, {line, filename, error, token}})

test/elixir/code/formatter_test.exs

@@ -7,6 +7,7 @@ module Code::FormatterTest
     "[]" = Code::Formatter.format_object([])
     "{1,2,3}" = Code::Formatter.format_object({1,2,3})
     "[1,2,3]" = Code::Formatter.format_object([1,2,3])
-    "abc" = Code::Formatter.format_object([$a,$b,$c])
+    "[97,98,99]" = Code::Formatter.format_object([$a,$b,$c])
+    "\"abc\"" = Code::Formatter.format_object("abc")
   end
 end