fix hidden bug in config file listing

see docs for init:get_argument/1 - a single "-config <file>" argument
comes back as [[<file>]], multiple come back as [[<file>], ...]. The
reason the previous code worked is that the functions in 'filename'
accept deep lists.
NB: we are not handling the case of "-config <file> <file> ...", but
then neither does the application_controller, and th docs for 'erl'
only mention a single file.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/rabbit.erl b/src/rabbit.erl
index a94af4ec..dd5fb89c 100644
--- a/src/rabbit.erl
+++ b/src/rabbit.erl
@@ -714,6 +714,6 @@ config_files() ->
     case init:get_argument(config) of
         {ok, Files} -> [filename:absname(
                           filename:rootname(File, ".config") ++ ".config") ||
-                           File <- Files];
+                           [File] <- Files];
         error       -> []
     end.